Hello, I would like negotiate with you for some supplies for a camping trip
What do you have in mind, I could use some things myself
We have most basic necessities but could use some more firewood, food and water.
We have some of that, but would like to know which you need the most?
We are taking our small child camping with us for the first time, and are thinking we would need the most firewood to help keep them warm.   
I would be willing to give up a little firewood and some water if you can give me as much food as possible. I vastly underestimated how much food I would need
I do believe that would be possible.  
Thanks, is there a preference on how much firewood you need?
3 packages would be ideal, but I can certainly work with what you are willing to share.  Is there a certain amount of food you need?
Same situation as you, please make a trade offer and I will accept if it is fair to both parties