Hi, what is your highest priority item?
I would love to have extra food for my trip, bringing the family! how about you?
I agree, it will be tricky to find extra food while camping. I'm sure we can figure out something that works for both of us... the water is also very important to me because it's supposed to be hot. There is plenty of wood where I'm going, so you can have the firewood. Would you be willing to take 3 firewood, 1 food and 1 food?
I would like at least 2 food, how does me getting 2 food, 1 water,2 firewood sound?
I think I can only give away 2 food if you are willing to give up all of the water. How about you take 2 food and 2 firewood? 
I think that sounds reasonable, i dont get too thirsty!