This is my fun trip for this year and preparing will help me be more self sufficient in the future.
Oh, how nice for you!
I would like to invite some friends you know to participate in the camping.
How many are you thinking about?
I was thinking 3 people this time around.
You're going to need lots of supplies then
They would be happy with the experience and I can be more altruistic this way.
I think maybe your biggest need will be water.
Yes, I agree that water would be the number one priority and it would help to be able to offer everyone a refreshing drink before letting them know how long the hike is.
So, I sugget you take the 3 pack of water and I will take the 3 pack of food and the 3 pack of firewood.
let me think about that for a second
That's pretty generous of me I think!
How about I take the 3 pack of water and you can have the 2 packs of food and firewood you.?
I'll take one water and 3 packs of food and 2 firewood.
Can you do 2 packs of food an empty stomach would not make it to far, especially on this trail. 
No, sorry, I can't do it!
How about 1 firewood then.
No, I'm really cold especially at night.  You and your three buds can huddle together if cold!
Okay I guess I will accept your offer and make the best of it.