I've had one of those 4 tray worm condo towers for years now. Love it! I keep it in the basement, it's clean, doesn't smell, they process kitchen scraps into worm tea and a dark rich clean compost.
Every winter I cut back a little on how often I was feeding them because I read in numerous places they are less active when it cools down. The basement gets pretty cold in the winter, so I figured that applied. I usually drop some extra bedding in but less food during colder months.
This year, I ran out of bedding so just layered some extra newspaper on top for the heat. Well the worms were happy with that, started partying and becoming amorous so now I have a population explosion in mid winter. I can't feed them fast enough. They are creating their own heat! LOL Instead of looking for them in bedding, there are tons of them everywhere, all balled up and between layers of paper. Talk about taking over the world!
Reading about this permaculture stuff is great, experiencing and observing first hand is much more fun!