Hi!  I am excited to go camping!  I would love to get 3 extra food and 3 water since we will be canoe camping and won't be able to purchase more.  
I am going camping too.  May I ask where you are going canoe camping?
We are going to camp in Oregon.  We are looking forward to it.  The views and scenery should be gorgeous.  How about you?
I am going to the Allegheny mountains in Pennsylvania.  I'm going to be hiking a lot so I will need some extra food.  Let's balance out the food and water somehow....
Sounds good.  We will also be hiking a bunch and I have little kids who go through water and food like crazy.
What if I get 2 food packages and 1 water package....and you would get 1 food package and 2 waters?
I think we will need more extra food than that.  How about the reverse, I get 2 food and 1 water and you get 1 food and 2 water.
I could do that if I could then get 2 packages of wood as well because it's been bitterly cold this time of year at night in the Alleghenies.
That sounds fair.  So I would get 2 food, 1 water, and 1 firewood.
Yes.  That's mighty kind of you and I'm glad we both got what we needed.