[Festus2]

If Mountainmax is going to be staying in his RV for a time and provided he takes preventative measures to avoid freeze-ups, then skirting and using heat strips or something similar would be ok.
Check out some of geo's posts --- he submitted a thorough description of steps and mods he took in order to make his RV liveable in freezing temperatures. These were mods done to the 5th wheel and did not involve any skirting or other outside mods.