Most of the time we dry-camp, so I rarely use the electric feature. I turn the WH off after dishes are done in the evening. The water heater insulation keeps the water warm enough through the night for hand/face washing. Turn it back on as soon as I wake-up for morning showers, etc. Then off again, until it's needed....
Water heater is off during transit, but we run the fridge on propane, and have so for years w/o problem. The "flame" for a propane fridge is very small, with the gas coming through a tiny opening. If the thermal-couple senses that the flame has gone out, it immediately shuts off the gas supply, then "times-out" for a short period, then begins the re-light sequence.
2014 RAM 2500 Laramie 4x4 Quad Cab w/Cummins Turbo Diesel, 2009 Rockwood 2607, and 3 'yaks!
300W of Suntech Solar, a Rogue MPT-3024 Controller, and a Xantrex PW2000 Inverter