Refrigerator & water heaters

I agree with (most) of above. I leave the fridge on if planning another trip fairly soon. If no immediate plans, then I turn off the fridge since ice will build up in the freezer.

I never leave the water heater on between trips. Just no real reason to. The water heats very quickly when you do turn power on. The fridge takes much longer to cool down after having been off for a while.