Hello, I want to keep 3 packages of the water and 2 packages of the food and 1 package of the fire wood , and you can keep 1 package of the food and 2 packages of the firewood.
Could I get 1 package of the water just to be entirely safe?? I really appreciate the 2 packages of firewood as it has been very wet and rainy where I will be going.  There will be a lot of standing water, so my chances for having safe water to drink might be a little iffy.
Well I planned on spending a few extra days here at this camping site with my family so the extra water will really come in handy for me over the next few days.  I can offer you an extra package of firewood to keep the 3 packages of water.
That makes total sense.  I will let you keep all 3 of the water packages.  If I take the extra firewood for all 3 packages then I can probably boil a lot of the water to get the harmful bacteria out.  I really appreciate your generosity 🙂.  
No problem.🙂  So I will keep the 3 packages of water and, since I am giving you all 3 packages of the firewood I will take back the 1 food package and keep all 3 of the food packages.
I would still like at least 1 package of the food please.  There has been a lot of rain in the area, but I think some poisonous mushrooms maybe prevalent in the area, so to be extra cautious I would like a little spare food on hand.
You don't have to eat the poison mushrooms. You can catch some fish from the river or hunt for small animals.  You have all of the firewood so cooking the food should not be a problem.
I won't willingly eat the poisonous mushrooms, but it could be very hard to tell the difference from safe and toxic ones.  I understand you will be staying in your area for a few extra days, but can you catch fish or hunt for small animals in your area too?
I do not have any extra firewood to do so.☹️  So if I can keep 1 package of firewood so I hunt and cook the fish.  I will give you 1 package of the food.
I would be willing to give up 1 package of the firewood to you for 1 package of the food.  
Thanks🙂  I will give you 1 package of the food and 2 packages of the firewood, while I keep the rest of the supplies for my extended trip.