Originally Posted by dennis b
At 32 it will take many hours before anything freezes. you should be good!
On top of this, if the temperature is predicted to get to 32, that means it may only be 32 for an hour or so. There's no way anything freezes solid enough to cause a problem, particularly if you have the heat running in the camper.
Just to be safe, it would probably be a good idea to open your bathroom and kitchen sink cabinets, to let the heat get to the pipes.