Overnight lows in 20s, not winterized

[Jawsborne]

Newbie here. We are renting an rv (2019 class c 22ft) and doing four nights in southern Utah. Overnight lows in 20s, day time highs in 40s-50s. We will have full hook up sites and not staying in one place for longer than two days. What’s our best options to prevent any type of potential pipe freezing? Should we be worried since temps aren’t below freezing for the entire day/night? I planned to run the furnace overnight and disconnect the water hook up outside (do I need to do that?)
Thanks!

 

[Neemer]

You should be okay with the furnace running. When I’m in temps like that, I will live off the water in the tank and store the hose.