Originally Posted by 69DAWG
It looks like during night in the low 30s to high 20s then up to the 50s during the day.
If you are going to be staying in it and using the heat (furnace) then with those temps, you should be OK. Temps below freezing for 18-24 hours you'll need to winterize.
Will you be using water from your fresh tank or connecting a hose to a hydrant?
If hose and hydrant, it may freeze on nights it goes below freezing if you don't use a heated hose and be sure the hydrant has some kind of frost protection. Best to just fill the fresh tank whenever necessary and use from it unless you have a plan for keeping the city water hose/hydrant from freezing.