Looking forward to the trip.  They gave up the bare essentials but I could really use some extra supplies.🙂
I could too, I am a little short on a few things!
My biggest concern is water.  I could really use more.  That and some extra food.
My biggest concern is food and then water. 
I'm going to need quite a bit more water, at least 2 packages.  I would like at least 1 food. What do you think?
How about you take two water and 1 food and 2 firewood?
That's kind of what I was thinking.  That would work for me.
OK, great, I forgot my fishing pole so the extra food will really help!
The extra firewood will help out keeping the family warm in case the temperature drops.
OK, perfect, I think we have reached a good deal🙂