2oldman wrote:
No. It takes sustained 25 or below type temperatures to be any concern at all. Get your night's sleep at home.
This is dangerous advice.
Water will freeze at 32 degrees. Wind chill will help evaluate how quickly any non-animate item will reach the prevailing ambient temperature (loose its stored heat).
Water actually freezing and doing damage is a function of the actual temperature it obtains and the time it stays at that temperature.
The ambient predicted temperature, the length of time of predicted sub-freezing temperature, plus the wind chill should help you decide.
Hence, 25 degrees for as an example of one hour duration with a minimal or no wind chill factor is of no concern since inside the RV it will probably never even reach freezing especially if the temperatures had been warm previously.
However, 25 degrees for 4 hours or more with a high windchill factor immediately following several days of near-freezing temperatures is a great concern.