JMO with only a few nights experience in the 30s but RVs are not good places to be in cold weather. Out of the factory they are not made for it.
Cold air leaks in around slides. Walls are thin. Glass is single pane & radiates the cold. Without some serious post construction mods they are simply no up to dealing with the cold.
You can put up a good fight against cold but it will take alot of electricity & alot of propane.
Point the thing south & don't stop until you no longer see bridge freezing before road warnings or no snow blowers outside of Lowes or Home Depot.