[wingnut60]

Glenn,
Was not in our old TK3, but newer RSSA--the single biggest help was placing a Vornado heater in the basement facing into the manifold area. That heater has a temp control and I set it at 45d--it ran constantly. Had a mechanics trouble light in the service bay, and also the Camco heated hose. Heated hose worked well, but still could not leave it connected as the spigot would freeze. Other trouble spots were the black and grey drains freezing--solved that when needed by running hot water into the grey tank, using an extra valve at end of the drainpipe to hold the hot water in the line. This worked well until I figured out the basement heat would keep the black water line unfrozen.
It was a constant battle until the weather warmed into the 40s. Having sunlight during the day on the service side was also a huge help.
Hope you survive--what in the world are you doing that far north this time of year?