I really need to be able to build a fire every night and I don't have enough firewood. I forgot to bring a blanket and a sweatshirt, and the nights are supposed to cool down a lot. 
Hello! I have no issue with you taking a lot of the firewood - I likely wouldn't be outside much at night anyway. 
🙂 Cool thank you! What can I help you with? 
I feel like I'd need the food the most. I plan on being very active throughout the trip, and if I'm not able to eat well, this wouldn't be possible.
Okay. I can definitely spare you some of the food! Do you need any water?
Yeah, water is important too... but I think it's a little less important than food for me. 
Same with me. We can split the water. 
I like that! If you took all the firewood, could I have two of the waters?
Sure. That's ok with me. 
Thanks for being reasonable. These are important decisions.
🙂
So if I take two food, two water and no firewood, is that alright with you? 
yes. it's a deal.