With my projects, I find I have to idiot proof things. If I can screw it up, I will.

You said that this will have full time power if the jeep is on or off. I see potential for backseat passengers feet, or my camp gear, to accidentally flip the power switch turning the invertor on. While this wouldn't cause the same drain as if you had something plugged in, I see me bumping the switch leading to a dead battery in the middle of nowhere. I would most likely attach a very visible light or LED, wired so that when the A/C side of the invertor was on I couldn't miss it.