How Level?

Plus or minus a couple degrees is fine..

You should never, as a new owner, ask about propane use on the road.. you may not be prepared for the $417 storm that follows.

That warning given, you can use either on the road, the "danger" of 12v is, if your TV is wired to allow 12v to run to the trailer even when the truck isn't running, is coming back to the truck and finding both batteries dead, TV and trailer, would take about 4-6 hours.. assuming both were healthy fully charged batteries..

The "danger" of propane is a belief that your entire rig, and most of the earths atmosphere will be incinerated if you stop for gas and don't turn off your fridge before pumping gas.

YMMV. Nearly EVERY camper bigger than a pod, and that's most of them, has no choice but to run on propane while traveling, and you see how many of them explode and burn down gas stations..

Having never owned a Propane refrigerator before, I understand that it has to be level to work properly. How Level? Can the bubble on a level be close? Or does it need to be "dead nuts on"? Is it ok to use the propane side of the fridge going down the road? Or do you run it on 12 volts then?
So many questions...