So far, so good.
23° F this morning.
Fresh water hose didn't freeze.
I drained the gray water tank last evening, because the valve is not inside the belly enclosure.
I'll be getting some protection for that this weekend.
Need to get a hose/pipe heater element and some insulation for fresh water hose.
Heater is running very well and keeps the interior as warm as you could want.
I think I'll treat myself to a digital thermostat though.