Hi there. I'd like 3 packages of food, and 2 packages of firewood. You can have 1 package of firewood and then all of the water.
Hi there! Hm. I was actually thinking that the food and firewood would be more useful to me than the water.
I see. Can you please explain why?
The group I'm camping with is having a fireside gathering in the evening, and I wanted to bring some food to share (doesn't food always taste best outside? 🙂) and also some firewood to contribute. Is there a particular reason you also wanted the food and firewood more?
That's understandable. I'm camping with a group of eight people for a whole week so I want to ensure that we have enough food for everyone. If we have enough firewood, we can cook enough meals to keep everyone fed 🙂
🙂  Great minds think alike!  Here's a thought: my group is also doing some hiking during the day, and of course, since it's summer, we want to make sure we have enough water. So I could definitely see splitting this in a "some of each" way for all three items.
Yes, that sounds great to me. How about we each take two packages of food, firewood, and water to start. Then, you can either take an extra package of food and I will take the extra firewood and water?
You say "each take two" of each of the three items ... I think you must have meant "each take one"? (There's a total of three of each item.) If so, for the extra, I think "food + wood" goes together better. How about one of us takes the extra water, and the other takes the extra food & wood?
Yes, my mistake. I mean you take 1 food package, 1 firewood package, and 1 water package, and then I will do the same. Then, you can take the food and wood and I will take the extra package of water! 
That works beautifully! I hope you'll have a wonderful camping trip. 🙂