How about a gas fireplace?

[NCFischers]

Ozz,
We've been camping when the temps have gone down to 34 at night. With the fireplace and an oil filled heater (looks like a radiator) running, our furnace never came on and the DW had to get up and shut the heater off because she was too hot. I'm not sure it would be worth the expense of changing to gas. I understand the boon docking aspect but when on hookups, I'm using the campground electric and not my propane.
Jim