Hey, I was thinking that I could take all of the food items, and 2 of the firewood items. My friend has low blood sugar and they need the food in case they crash, and the warmth of the fire to maintain at evening.
Water is my highest priority, what is yours? Is it food?
Yes, food is my highest. It's necessary for my friend to keep extra around just in case he crashes. Why is water your highest priority?
I need the water to drink - I don't trust the water I might find at the campsite.
Did you bring any water to start?
Yes! Did you bring any food to start?
I did, but my friend only feels comfortable with extra around, God forbid, if something happens this could save his life. So I'm thinking, I take all three food packages, two firewood packages and leave all three water and one firewood for you. 
I think that it is fair that you get three food and I get three water, but why should you get two firewood to my one?
The food is not for me, I'm not allowed to touch it. t\The only real benefit I'm getting here is firewood. ☹️
OK,that sounds good. So you get three Food, I get three Water, and we split the Firewood, you get two and I get one.
That works, thank you for your understanding.