forth TT and we always turn the propane on while traveling for the fridge. All of ours were 2 way 120 or propane. We had 2 that were adjustable thermostats and others that were set from the factory. All work great. I never turn fridge off while refueling but have to shut it off at the inspection prior to tunnels under the ocean going to the Outer Banks. I just stop when we get out and turn the propane back on. I have dual 30# tanks and if I don't have the furnace running I could run the fridge a month on propane. Uses very little and once plugged in to shore power I'm off the gas except cooking and hot water.
I camp on average 7 weeks a year and only use up one 30# tank every two years. Our drive to the beaches usually run 8 to 13 hours depending on Atlantic, Florida or Alabama shores. If I didn't run propane for fridge we would have to use coolers and a lot of ice. Temps run 80-100 degrees. Use the propane..enjoy