diff --git a/.gitignore b/.gitignore
index 6d9997a..f02a2f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -112,5 +112,7 @@ ENV/
 # local config files
 *.config
 *.evals
+*config.yaml
+*submission_queue.json
 
 .DS_Store
diff --git a/synorchestrator/config.py b/synorchestrator/config.py
index 2abcabe..3b8d7c3 100644
--- a/synorchestrator/config.py
+++ b/synorchestrator/config.py
@@ -1,5 +1,5 @@
 """
-The orchestrator config file has three sections: eval, trs, and wes.
+The orchestrator config file has three sections: queues, trs, and wes.
 
 This provides functions to save and get values into these three sections in the file.
 """
@@ -12,7 +12,41 @@
 logger = logging.getLogger(__name__)
 
 
+def _default_config():
+    """
+    Create default app config, if not existing.
+    """
+    config = {
+        'queues': {
+            'queue_1': {
+                'trs_id': None,
+                'version_id': None,
+                'wes_default': 'local',
+                'wes_opts': ['local'],
+                'workflow_attachments': [
+                    'file://tests/testdata/md5sum.input',
+                    'file://tests/testdata/dockstore-tool-md5sum.cwl'],
+                'workflow_id': None,
+                'workflow_type': 'CWL',
+                'workflow_url': 'file://tests/testdata/md5sum.cwl'}},
+        'toolregistries': {
+            'dockstore': {
+                'auth': None,
+                'auth_type': None,
+                'host': 'dockstore.org:8443',
+                'proto': 'https'}},
+        'workflowservices': {
+            'local': {
+                'auth': None,
+                'auth_type': None,
+                'host': '0.0.0.0:8080',
+                'proto': 'http'}}}
+    save_yaml(config_path, config)
+
+
 config_path = os.path.join(os.path.dirname(__file__), 'config.yaml')
+if not os.path.exists(config_path):
+    _default_config()
 
 
 def queue_config():
@@ -37,13 +71,13 @@ def add_queue(queue_id,
               wes_default='local',
               wes_opts=None):
     """
-    Register a Synapse evaluation queue to the orchestrator's
+    Register a workflow evaluation queue to the orchestrator's
     scope of work.
-
-    :param eval_id: integer ID of a Synapse evaluation queue
     """
-    # TODO: require either workflow url/attachments OR
-    # TRS information for retrieval
+    if not wf_id and not wf_url:
+        raise ValueError(
+            "One of either 'wf_id' or 'wf_url' must be specified.")
+
     wes_opts = [wes_default] if wes_opts is None else wes_opts
     config = {'workflow_type': wf_type,
               'trs_id': trs_id,
@@ -61,7 +95,7 @@ def add_toolregistry(service, auth, auth_type, host, proto):
     Register a Tool Registry Service endpoint to the orchestrator's
     search space for workflows.
 
-    :param trs_id: string ID of TRS endpoint (e.g., 'Dockstore')
+    :param trs_id: string ID of TRS endpoint (e.g., 'dockstore')
     """
     config = {'auth': auth,
               'auth_type': auth,
@@ -70,12 +104,12 @@ def add_toolregistry(service, auth, auth_type, host, proto):
     set_yaml('toolregistries', service, config)
 
 
-def add_workflowservice(service, auth, auth_type, host, proto):
+def add_workflowservice(service, host, auth=None, auth_type=None, proto='https'):
     """
     Register a Workflow Execution Service endpoint to the
     orchestrator's available environment options.
 
-    :param wes_id: string ID of WES endpoint (e.g., 'workflow-service')
+    :param wes_id: string ID of WES endpoint (e.g., 'local')
     """
     config = {'auth': auth,
               'auth_type': auth_type,
@@ -84,6 +118,21 @@ def add_workflowservice(service, auth, auth_type, host, proto):
     set_yaml('workflowservices', service, config)
 
 
+def add_wes_opt(queue_ids, wes_id, make_default=False):
+    """
+    Add a WES endpoint to the execution options of the specified
+    workflow queues.
+    """
+    if not isinstance(queue_ids, list):
+        queue_ids = [queue_ids]
+    for queue_id in queue_ids:
+        wf_config = queue_config()[queue_id]
+        wf_config['wes_opts'].append(wes_id)
+        if make_default:
+            wf_config['wes_default'] = wes_id
+        set_yaml('queues', queue_id, wf_config)
+
+
 def set_yaml(section, service, var2add):
     orchestrator_config = get_yaml(config_path)
     orchestrator_config.setdefault(section, {})[service] = var2add
@@ -95,16 +144,39 @@ def show():
     Show current application configuration.
     """
     orchestrator_config = get_yaml(config_path)
-    workflows = '\n'.join('{}:\t{}\t[{}]'.format(k, orchestrator_config['queues'][k]['workflow_id'], orchestrator_config['queues'][k]['workflow_type']) for k in orchestrator_config['queues'])
-    trs = '\n'.join('{}: {}'.format(k, orchestrator_config['toolregistries'][k]['host']) for k in orchestrator_config['toolregistries'])
-    wes = '\n'.join('{}: {}'.format(k, orchestrator_config['workflowservices'][k]['host']) for k in orchestrator_config['workflowservices'])
+    queues = '\n'.join(
+        ('{}: {} ({})\n'
+         '  > workflow URL: {}\n'
+         '  > workflow type: {}\n'
+         '  > from TRS: {}\n'
+         '  > WES options: {}').format(
+            k,
+            orchestrator_config['queues'][k]['workflow_id'],
+            orchestrator_config['queues'][k]['version_id'],
+            orchestrator_config['queues'][k]['workflow_url'],
+            orchestrator_config['queues'][k]['workflow_type'],
+            orchestrator_config['queues'][k]['trs_id'],
+            orchestrator_config['queues'][k]['wes_opts']
+        )
+        for k in orchestrator_config['queues']
+    )
+    trs = '\n'.join('{}: {}'.format(
+        k,
+        orchestrator_config['toolregistries'][k]['host'])
+        for k in orchestrator_config['toolregistries']
+    )
+    wes = '\n'.join('{}: {}'.format(
+        k,
+        orchestrator_config['workflowservices'][k]['host'])
+        for k in orchestrator_config['workflowservices']
+    )
     display = heredoc('''
         Orchestrator options:
 
         Workflow Evaluation Queues
-        (queue ID: workflow ID [workflow type])
+        (queue ID: workflow ID [version])
         ---------------------------------------------------------------------------
-        {evals}
+        {queues}
 
         Tool Registries
         (TRS ID: host address)
@@ -115,7 +187,10 @@ def show():
         (WES ID: host address)
         ---------------------------------------------------------------------------
         {wes}
-        ''', {'evals': evals,
+        ''', {'queues': queues,
               'trs': trs,
               'wes': wes})
     print(display)
+
+
+
diff --git a/synorchestrator/config.yaml b/synorchestrator/config.yaml
deleted file mode 100644
index 6d66b1f..0000000
--- a/synorchestrator/config.yaml
+++ /dev/null
@@ -1,49 +0,0 @@
-queues:
-  queue_1:
-    trs_id: ''
-    version_id: develop
-    wes_default: local
-    wes_opts:
-    - local
-    workflow_attachments:
-    - file://tests/testdata/md5sum.input
-    - file://tests/testdata/dockstore-tool-md5sum.cwl
-    workflow_id: ''
-    workflow_type: CWL
-    workflow_url: file://tests/testdata/md5sum.cwl
-  queue_2:
-    trs_id: dockstore
-    version_id: develop
-    wes_default: local
-    wes_opts:
-    - local
-    workflow_attachments:
-    - !!python/unicode 'https://raw.githubusercontent.com/dockstore-testing/md5sum-checker/develop/md5sum/md5sum-tool.cwl'
-    workflow_id: github.com/dockstore-testing/md5sum-checker
-    workflow_type: CWL
-    workflow_url: !!python/unicode 'https://raw.githubusercontent.com/dockstore-testing/md5sum-checker/develop/md5sum/md5sum-workflow.cwl'
-  queue_2_checker:
-    trs_id: dockstore
-    version_id: develop
-    wes_default: local
-    wes_opts:
-    - local
-    workflow_attachments:
-    - !!python/unicode 'https://raw.githubusercontent.com/dockstore-testing/md5sum-checker/develop/checker/md5sum-checker.cwl'
-    - !!python/unicode 'https://raw.githubusercontent.com/dockstore-testing/md5sum-checker/develop/md5sum/md5sum-tool.cwl'
-    - !!python/unicode 'https://raw.githubusercontent.com/dockstore-testing/md5sum-checker/develop/md5sum/md5sum-workflow.cwl'
-    workflow_id: !!python/unicode 'github.com/dockstore-testing/md5sum-checker/_cwl_checker'
-    workflow_type: CWL
-    workflow_url: !!python/unicode 'https://raw.githubusercontent.com/dockstore-testing/md5sum-checker/develop/checker-workflow-wrapping-workflow.cwl'
-toolregistries:
-  dockstore:
-    auth: ''
-    auth_type: ''
-    host: dockstore.org:8443
-    proto: https
-workflowservices:
-  local:
-    auth: ''
-    auth_type: ''
-    host: 0.0.0.0:8080
-    proto: http
diff --git a/synorchestrator/queue.py b/synorchestrator/queue.py
index 5f0cecc..d63c4d3 100644
--- a/synorchestrator/queue.py
+++ b/synorchestrator/queue.py
@@ -8,7 +8,8 @@
 
 
 submission_queue = os.path.join(os.path.dirname(__file__), 'submission_queue.json')
-
+if not os.path.exists(submission_queue):
+    save_json(submission_queue, {})
 
 def create_queue():
     pass
diff --git a/synorchestrator/submission_queue.json b/synorchestrator/submission_queue.json
deleted file mode 100644
index ff98656..0000000
--- a/synorchestrator/submission_queue.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-    "mock_queue_1_checker": {
-        "300830212830955405": {
-            "status": "RECEIVED", 
-            "wes_id": "local", 
-            "data": ""
-        }
-    }
-}
\ No newline at end of file