So i have a rockwood high wall. I don't if it has an auto shut off when it pops down. I am wondering first of all if my fridge will run off battery while in transit, and if it does will I have enough battery for my trip after driving for 2 or 3 hours? We don't spend much time in the pup while camping, just cooking and sleeping. I will put the fridge on propane once we re at the sight, I am just not comfortable driving with it running.