Have a hair dryer handy as well for the dump valve and in case the LP regulator freezes.
If you have the slide out , make sure you have a broom and ladder to scrape off the slideout roof before you pull it back in. Heat from inside the rv tends to penetrate those thin slide tops and if it snows, it can melt and turn to ice overnight making it more difficult to remove.
When parked long term , try to block the wind from going underneath the rv. I have seen some people use a simple tarp where they cut it into narrow widths of maybe 3 ft and long lengths to skirt the bottom. They used parachute cord to tie along the perimeter. You can 'dead-man' the bottom of the tarp in place with frozen snow, dirt or firewood to hold it from flapping.