In Northern Michigan, most of my camping is during the winter, COLD winter.
Keeping your plumbing systems operational is a battle, but the bigger battle, is what to do with the holding tanks when it's time to dump them.
Cleanout at home? Nope, buried under 4-5ft of snow. Cleanout at a rest area? Nope, gated off until June. Cleanout at the RV park, gated off and buried under 4-5ft of snow.
Just something to think about.
For me, I try to heat with gasoline when possible, it's cheaper than propane and much easier to find refills. When I'm alone in a rustic campground, or just setup in the woods, the generator runs non stop.