Didn't read all replies, forgive redundancy:
I have a 2001 F350 SuperCab. It had a split fold-up rear seat. I pulled the whole thing out with a few torx bits and have not missed it all.
The solid seat back wich spans the whole width of the cab just hangs on two hooks. It's easily removed to create even more space but the inside of the cab is not painted behind it.
An appropriately-sized piece of plywood with strategically placed hooks could take the place of the seat back and be fitted with any number of goodies: gun rack, hooks to hang stuff, shelves/ bins, whatever.
Plenty of room now for dogs, lawn chairs, etc. I haven't tried yet, but I suspect I'll be able to fit two bicycles back there (front wheels come off) without much fuss - more secure, dry, and negates the need for a carrier (hitch mount or otherwise).
...and that's a supercab. Pulling the seat out of a CC would be like having an indoor pickup truck in front of your camper.