Noone except someone with your particular RV and experience in those conditions can say with certainty.
However "generally" below freezing at night and above freezing during the day (not 0 at night and 38deg at 4pm, more reasonable temps) is of no concern.
Since I'm sure you looked at the forecast which is - not surprisingly - clear n sunny, with temps in the 50s/60s daytime and 20s for lows, I wouldn't even hesitate or give it a second thought.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold