cummins93 wrote:
The biggest thing I am worried about is my hot water heater, not sure what to do with that yet,
If the water is hot, it won't freeze. It might use a lot of propane to keep warm, but it definitely won't freeze. If you have an electric element, it will continue to heat it until you have no power.
That would be one of the least of my worries.
You have Kelseyville listed as your location. Is this where you are going to be for the winter? If so, I wouldn't be too concerned after I did the things I listed above. If the temps are not going to be below freezing for more than 24 hours at a time, it may be cool inside, but it won't be cold. Wear sweatshirts and pants along with some socks and you should be good.
I might also get some reflectix to go over my windows at night or when the temps were cold. The sun coming in during the day will warm the trailer, so I would remove them during the day.