Do u have a slide ? If u do , its best to be able to have use of your rv with it pulled in. Its warmer and uses less LP when its in.
If it snows you will need to clear the slideout roof before you can pull it back in. You’ll need to be able to access your roof and carry a broom. Slideout awnings make that task more of a chore. Wind blows the snow under the topper trapping it.
You should also have a hair dryer to thaw a slightly frozen dump valve.
Your water hose will freeze at night , fill your water tank and run the pump. Remove your water hose from the spigot and hang it over the ladder so it drains and is ready to use when the temps return back up.