I camp a lot, not always at improved campsites, and wanted the convenience of on board AC power for powering small electronics, lights, fan, radio, blender
Settled on a marine grade 400W w dual GFI outlets. It has an independent on-off switch as well as a built-in battery saver.
I run with the back seat out most of the time but even when in, the outlets are accessible along the side of the seat
I wired it up with some good wire and grounded it to the body tub.
Fused with an 80Amp spade fuse behind dash side panel. It was a tight squeeze.
Wire was ran through the hole in the dash behind the cowl. The inner fender had a lip that needed to be tweeked with a long pry bar but I managed to stuff it through and attached to battery with a new gold plated terminal.
Voila! Now I can power camp lights, a small coffee pot, power tools, laptop, PSP's, portable DVD, etc, etc right out of my Jeep! Cost was less than $100.