I'm very excited to take our cub scout troop camping this weekend!
It should be a lot of fun I hope the weather is nice
The forecast looks clear from what I've seen. We are planning to build a big fire and learn to cook over it!
That is always a lot of fun I do love teaching kids something new about survival 
They really enjoy earning badges, and it's great to pass on new skills. Would you find if we take some extra food and firewood for our project?
I wouldn't mind giving you the extra firewood. I would love to have some extra food as well
I've got plenty of water. I wouldn't mind giving you a food and some water if I can get the firewood.
I have no issues with that at all. Beings you will be teaching them about cooking over the fire it would be more beneficial for you to have extra. 
That sounds good. So you get 1 food and all water, and I'll keep firewood and 2 food.
That sounds like a good plan to me