If your Stateside an can't use a gen set look at inverters. Cheap ones that work:
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One deep cell 12v battery plus an inverter can run heat panels for days. Add solar an you charge an heat if the sun is out.
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Buddy Heaters for propane.
Everything really depends on storage. If you don't have room for tools you need to plan moves for family an animals during emergencies. Pillow cases an coolers work great for smaller snakes. Sleeping bags for the big guys.
There are many prepper forums on the web. Look at some for ideas but many sites are safer to read only.
Planning for disasters will lesson damage in the long run.
With any tool, better to have an not need then need an not have.
Good luck!