Although the OP is concerned about exterior damage, I would be far more concerned about interior damage: specifically condensation.
Here in the Pacific Northwest, the temperature and the dew point typically track pretty close.
What happens is, a cold front moves in, the temp drops a few degrees, then when it warms back up, the insulated RV interior is colder inside than out, AND below the dew point. So, you get a bunch of water on the inside.
Some combination of low heat and/or a dehumidifier is a must.
I also "use" the Class C one Saturday a month to keep everything working.