I’m surprised I haven’t seen other tips like this. In the episode of the Walking Dead in Season 1 where they are in that traffic jam on the highway, they turn on a car and the emergency broadcast starts playing. If that broadcast is still going, then the tower and station would still have power, most likely renewable. If they could find where this tower and station was then they can set up base there and tap into it’s power or whatever is powering it like a dam, or windmill, or whatever. No need to huddle around candles in a small house in the harsh winter while they could be relaxing in a station with central heating or A/C and send signals to other people, telling them it’s safe where they are. So long to the dark ages and hello to electricity.