Even though I have yet to make my inaugural trip in the Chimera, I can speak to what I have used when Jeep camping:
Add some Jones Candy Soda (all natural no high fructose corn syrup) for the kids and if you really want, swing by a mexican supermarket and get some mexican cokes in the bottles. (also no HFCS)
Costco also has some instant potatoes (just add water or milk) that dry store very well, the brand is IDAHOAN, and they're actually quite good.
Zatarains has individual pre-cooked servings of Jambalaya, Gumbo, Red Beans and Rice, Yellow Rice, Chicken and Yellow rice etc etc that are in easy to eat out of bags. Those also store dry very well (have kept a few in my camp bag for a while now) Got these at Food Source, kind of hard to find but are worth it.
hot sauce. stores well, helps a lot of food taste better (imo)
small salt and pepper shaker combo unit.
Gin goes a long way mixed with 7-up or tonic water. Also can be added to your water tanks to help keep from freezing, or so I hear.
It's a heckuva lot easier to carry a bottle of gin and tonic waters than the 36+ beers equivalent.
Capri-suns. Not my favorite because of the corn syrup, but they pack extremely well because of the bags, and are a pretty good hangover remedy. Good insulation once they're cold to keep food chilled too.
and fire pit:
If you have onboard air, I would consider a pneumatic jack
to lift the vehicle for tire changes.
. Even a cheap compact set is just one of those things that's nice to have around. I carry a compact tasco set (12x25) that I got from walmart in a bag with the following:
Swiss army knife
(a small backup that's always in the bag.)
Thermal emergency blanket
(looks like aluminum foil)
small first aid kit
with bandages, creams, light pills, water sanitizer, safety pins, etc
anti-itch pen. (also useful for numbing cuts, has benzocain in it)
with clear window for map overlay and signaling mirror
Wind up emergency light and radio
Life saver candies
This all fits into a pack a little smaller than the size of a typical fanny pack.
I am looking into either a telescope, or high-powered spotting scope/binocs for stargazing. The concerns with a good telescope are of course the abuse that the trail will put on any fine optics
Small bag of firelogs
(the ones that are meant for backyard firepits) in case you can't find firewood)
Variety pack of about 30 different sized bunjee
General purpose nylon rope
Boy Scout Handbook
A good leatherman
. With a bottle opener. I can't tell you how many times it has been my hero at the campground. Good for cutting limes AND opening the corona.
Good Petzl head lamp
with red filter (for late night trips so you don't shine light in other people's tents)
FRS or family band hand radios
even a simple GPS
for the trail is an excellent idea. At the very least, make sure it can 'track' the path you take, so you can look at it and reverse your steps.
if you're going to be really out there boondocking. These are the emergency beacons that can cost a couple of hundred bucks and you will most likely never ever use. But if you do... it's like having an extra life in a video game.
Multi-purpose axe/wood saw/shovel (smaxe kit)
CB and Radio Scanner (with weather channel monitoring)
extra roll of TP in a heavy duty ziplock bag.
extra heavy duty ziplock bags.
Contractor Bags (heavy duty 3 mil black plastic bags) for trash, tarps, emergency poncho :-D
This is all off the top of my head, and like I said is based on my typical jeep outfitting. I'll let some others add to the list