I wouldn't be at all concerned about temps in the 30's while living in the rig. If freezing temps are forecast I would have the water hose outside only when filling the fresh water tank. Unless you have water lines totally exposed under your rig, there should be no problems down into the 20's. A year ago while in Ft Worth, it got down into the teens one weekend!
Knowing the fine details about your rig might help put your mind at ease. Many port heat to the basement area from the LP furnace(s). Mine does, and we have been in temps below zero for up to a week with no problems while running the LP furnaces. Obviously, running only an electric heater in the living area to avoid using LP would not do much for heating those basement areas that depend on heat from the LP furnace.
Something else that could help would be to get a wireless thermometer with remote sending units so you can monitor the temp in sensitive areas. We have one with three remotes. We use one in the refrigerator, one in the basement water service bay, and one in the basement compartment where the water pump is. If one of the compartments fell below freezing, I would put an automotive trouble light or spot light in the compartment. The heat from the bulb in the small compartment would make a huge difference. If you do this, make sure the bulb cannot come in contact with any wood or other flamable surface.
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Paul (KE5LXU) ...was fulltimin', now parttimin'
2022 Coachmen Leprechaun 319MB
towing 2017 Jeep Grand Cherokee Limited
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