Hi, I am looking at extra items for my camping trip and would like to have 3 firewoods, 3 foods and 2 waters.
Hey, I am excited to go camping too!  Would you mind sharing your top priority items with me so that we can come up with a fair deal?  Ideally I would love 3 firewoods, 3 foods, and 2 waters just like you aha.  But perhaps we can each get at least 3 packages of our highest priority item 
Hmmm, I think I really need the firewood.  I brought softwoods and they burn out quickly so I don't think I'll have enough wood to keep me going through the night. I get kinda scared without the fire.  What is your priority?
Okay, well firewood is also my top priority since it will be so cold tonight.  But I would be willing to take only 1 firewood (and give you 2) as long as I got 2 foods and 2 waters 
Thank you for the offer on firewood.  I think that sounds fair.  However, I really would like at least 2 waters as well. 
Hmm unfortunately I can't budge since I would be accepting less of my top priority item.  It sounds fair to me though; I'd get 5 items in total but less of my top priority and you would get 4 items in total but more of your top priority
Well, how about if I take 2 firewoods and all of the food and you can have all of the waters? I have a device that I can make clean water, but will need more calories to do so! 🙂
Can't do!  Water is my lowest priority since I already brought iodine drops to purify water myself aha.  I still think it's fair if I get 1 firewood 2 food and 2 water (or if it helps you to feel better, I can take 2 firewood and 1 food and 1 water)
Ok...Then how about if I just take 2 firewood, 1 water, and just 1 food?  I think that is what you proposed before.
Yup that works for me!