Looking forward to this camping trip!  I am hoping we can find something amicable with these additional resources.
I'm excited too 🙂. Things have been stressful lately. What are some things that you value most?
It's supposed to be chilly where we are heading and I could really use some extra firewood.  🙂  What about you?
I really need food and firewood. Could you do 3 firewood and 3 food packages? My son has a problem with poor sugar levels which cause him to convulse when cold and doesn't eat enough food.
Unfortunately, we have some dietary restrictions of our own with my youngest and her Type 2 diabetes.  The firewood is pretty crucial to our plans, though I might have some wiggle room on the food.
I might need to walk away.
That seems like a pretty extreme move.  Supply and demand is always an issue. What do you plan to offer by way of a compromise?
If you give me 3 firewood, I'll give you 2 firewood and we can split the water. That's about where I'm at. 
I don't think we can split three firewood into five unless it was a typo?   I could give you 1 firewood, 2 food since I know how crucial this is for your family, and 2 water.  That leaves me with 2 firewood, 1 food, and 1 water.
That's a deal.