20F here at 4000 ft / 1200 m in the snowy central Sierra Nevada range at 2 AM.
Power? Check. Propane? Check. Backup genny? Maybe next year. RV? Check. Survival? Likely, medical affairs allowing. Comfort? As long as there's power and propane, check. No cell or WiFi up here and if we lose DSL we have many books. To read. To burn, PRN. The net is optional.