We have a heat pump for everyday use but a wall mounted propane heater for outages and when it gets below 10 and the heat pump struggles. It’s enough to keep our little house cozy in an outage. I also keep a gallon of water in the freezer which just acts as a huge ice cube. We don’t have a generator so I shuffle fridge food inside and outside to keep it in the cold sweet spot. One of the best things we have is a solar powered phone charger. Enough to charge us four times over, more if we let it sit in the sun. We usually take trips out for food during an outage. In general I’d say we’re very well prepared but I still absolutely hate being out in the winter. I stress.