You'd need a nightmare of extension cord, that's for sure.

[There's a big heap of blankets on one side which probably took a lot of trips to move, and nothairs as thick as fine human hair are sprinkled about, even caught on the chiseled walls. It's somewhat warmer here, out of the wind, so breath doesn't condense.]

I've seen a couple more, but they had spiderwebs across the entrance, and this one's facing east, so when the sun rises there's more light.