How to initialize and persist client state

[bgreen0]

Hi,
I'm beginning to get familiar with the lwm2m client daemon, and I'm fairly new to lwm2m.
How does one create and initialize objects before the client contacts a server (bootstrap or otherwise)? Consider the Device object for example. How is it supposed to get initialized on startup such that it can be queried by the server?
Secondly, can the client persist its state, including subscriptions, so that it doesn't always start from a completely uninitialized state?

Thanks,
Bryan