Mine is a conversion minivan with a high roof, not really an RV. It's licensed as a car or PU would be. It is EITHER a great office/dinette/living room, with plenty of lights, rear AC, fan, a luxurious chair, table, TV/DVD and room to stretch. OR a very comfortable bedroom with well-placed reading light. But not both at the same time. I have installed a battery isolator, an auxillary battery and a large alternator for the goodies. When it came time to purchase I went with a minivan rather than full-sized in the interest of gas mileage, and get 22 MPG at 70 MPH with a medium-sized engine. And it's certainly not as comfortable or well-appointed as a full-size van or RV.

The chair/bed converts both ways easily and as a bed is very, very nice for an old backpacker. The heater uses a 16.4 oz. canister of propane, not a tank. It will last about 8 hours on high, I don't know how long at 1/2.

Checking the cost and instrumentation for a propane detector shows it's significant. I promise I would have one if I had more of an exposure to propane leaking. But I doubt if I'll have this thing on except when I'm awake, and would notice if it went out. Hopefully.

Thanks again, and I think you're on to something with the internal bike rack.