If it ain't rollin' it is hooked up.
There are a fair number of people that believe that leaving the fridge on all the time is a good thing, reduced wear and tear on the cooling system going from operating to not operating. I would cut power to the water heater and leave the fridge on normal setting, just make sure everything you want is off before leaving. When my unit is parked at home it is plugged in with the fridge on and A/C set on 78° to keep the interior temp at a reasonable level. About the only time we will unplug is a severe thunder storm threatens. I do have an EMS, but don't want to take chances.