After 2 road trips camping, I've learned a couple things. Trip 1 was on the cheap, cheap. I laid down the seats and put a camping pad inside and filled the interior with tons of stuff I didn't really use (giant cooler, pop up canopy, large folding table, etc etc etc). Was a daily struggle moving and fighting with it and trying to sleep. I did make some custom cut window pieces and vents, which helped with sleeping.
Trip 2 I bought a trifold 4" foam mat. Made life better. Tried to downgrade to a smaller cooler, but it was trash for ice retention and ended up buying a nicer one on the road. Still carried too much stuff and had to fight for organization. I did buy a little small "solar generator" for my phone and stuff.
This next trip will be about 45 days. I'm seeking to upgrade my entire setup.
Drawing inspiration from the forum and some commercial deals (albeit for 5th gen) I'm working out a drawer system for the back that will extend for sleeping. I want it to be able to go 60/40 to allow for the use of a 3rd seat, when needed. I'm 6'4" and can't sit up in the back with a mattress, so I like having the back seat free to sit in if I want.
The plan so far is a platform in the rear that sits flush with the cargo pockets above the wheel well. It will sit on 80/20 aluminum T stock with feet.
Will have 2 locking drawers (length tbd, but 32-34") roughly 60/40 split in width.
D rings located on top for a fridge / battery, possibly some slits cut with a little bar underneath that I can run flat straps through to make it more modular for tying stuff down.
The back end will utilize locking drawer slides that have flat stock mounted between each slide. This will let them close over the main drawers. Flat stock will have some holes for the sleeper boards to sit in. Each side is independent. A couple of velcro tabs to keep it from rattling.
The sleeper boards will have rubber feet to hopefully ride well and not rattle when not deployed. Will have some bolts (or maybe the rubber feet) to slip in to the flat stock holes. This could also be a use case for the inset strap bars to tie them down when not in use.
Probably some little wingies to cover up the area between the cargo boxes and the back gate.
Fancy it up with some nice drawer faces and what not.
This is a working idea in progress, but after thinking of stuff, forgetting it, then trying to think of it again, I wanted some ideas down.
Will come back, or perhaps make a full post if the project doesn't turn out to be a disaster.
edit: My numbers are not accurate for the cargo area. Drawer and platform size will adjust accordingly when it's not 20 degrees outside and I can get out to it.