We have a smal coil radiator heater we leave In the bath over winter. Set it about 50 degrees and leave it, but check it occasionally. Unit has a tip over switch we felt we needed as our rescue is pretty noisey pup and a bit busy. Use the heater in tt if we do venture out in winter for short trip. The other benefit with this arrangement, heater eliminates any moisture in the area. No moisture on the large skylight in shower either. Needles to say, leave Blue Streak alone.
Marriot2 on Wheels 2017 Flagstaff Classic 832 OKBS
2013 GMC Denali 6.6L 2500 HD DMAX w\Alison Trans
Pepper Pomeranian rescue 101 days as camping buddy
Days camped in FR, 2011 = 20, 2012 = 57, 2013 = 59
... 2014 = 39, 2015 = 52, 2016 = 68, 3 more planned