Living in the middle of no where this was a major concern for use too. We only keep two snakes at the house, the rest stay in the nearest town to us in a place we rent. About 10 miles away. Even by "town" its still only 1000 people, but it has more convinces then we do, so we decided to move the snakes there. Not saying the power cant go out there.
So, if the power goes out at this house, or were the snakes are kept, we have a large portable generator, a 3/4 ton 4x4 and a huge box of 30 hour heat packs.
I'm glad you brought this up. The winter and power outages clam people's collections every year. People need to be prepared that live in cold areas.
David.