I cleaned out the worm bin today. Did not see any worms. It may have froze on the back (enclosed) porch, plus it was rather dry.
I started a new batch with my onion-cleaning scraps and a bunch of Amazon-mailer-and-junk-mail bedding. I will get worms tomorrow. I think we have a local hunting/fishing shop that raises worms themselves. I will see if I can get a larger quantity from them for reasonable. If not, I'll probably just get a little can of 30.
I'm keeping them in the kitchen. The basement or back porch is too much effort. If fruit flies become an issue, I'll deal with it then.
At least one of the buckets should be replaced soon.
Mealworms next on the list.