[wingnut60]

That is certainly isolated. Should be getting warmer before long. Very tough for your wife, I can imagine. As Cummins said, as you are doing, fill tank and disconnect/drain hose. Only other labor-saving thing I can offer--get a heated hose, use it to fill, disconnect it but don't let it drain/raise the outlet higher than the spigot. It will be ready to use when needed, if elec doesn't go out.
How much land do you have?
You are tougher than I am...