Luggage, are you full-timing in it or prepping it for storage?
Just went through night #1 in Alabama with temps in low teens and tonight will be even lower. Being that I full-time I made a heated water hose and have extra propane on hand. At 13 above I had a moment this morning of no water but that only lasted about 15 minutes. Tonight I think I'll let the water trickle when I go to bed (gray tank open of coarse) and see if that helps.
In colder weather than this (Minnesota) I would just pull all water connections inside (the basement) and run off of the water tank. I would also keep my thermostat turned up to 72-74 to make sure the furnace pumped warm air into the underside of our coach.