My fresh water tank is 87 gallons and I just fill it and unhook the water hose and drain it. Then I use the onboard fresh water. No need to worry about a frozen hose. Others above do the same thing. Keep it Simple!!!!
Full-timer. On the Class C, I built a heated hose... again. If using the heat tape/cable (I used Frost King Brand) buy pipe insulation one size larger than the hose. This will allow for the heat cable which takes up a surprising amount of space. This year, I used Gorilla Tape to seal my pipe insulation. I'm hoping this will last longer than the duct/duck tape. We are currently in NM, but have had to use heat taped hoses even when we stayed in S. GA (about 100 miles north of the FL/GA state line). That winter even my tank valves froze up. We have exposed tanks. Now I just make a foam board box to protect the tanks from freezing and drape a short heat tape around the tank valves.
We spent one winter in our Sunnybrook 27FKS with temps as low as +15 degrees for extended periods. Heat tape on the water supply hose, then wrapped with black foam pipe insulation, a heat source (trouble light w/100 watt bulb) over the enclosed campground water spigot with continuous heat inside the trailer (cupboard/cabinet doors cracked to allow heat to enter) and we survived quite well.
2007 Winnebago Journey 34H
Toad, '08 Ford Taurus X
Blue OX, Aventa
US Gear UBS
Why waste the water, with dripping faucets. What a waste of good water. As said, "K.I.S.S". "Keep It Simple Stupid". As others have said, Fill your Fresh Water Tank, then disconnect your water hose, and drain, and put your hose away. It doesn'tr get much simpler than this. A little over 45 years as RV'er's, and have never needed a Heated Hose yet. I might think about it if we were going to be in extream cold, for long periods of time only. Good Luck. Happy Travels. Dan & jill
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