I have two 30 gallon Geopots. I like 'em a lot. One is filling up, after which I will start bag #2.
The bags are on a 2x4 platform, with the 2x4's upright like little floor joists. 3/4" plywood on the bottom, wire mesh (hardware cloth) on the top. The bags rest on the wire mesh, allowing air to circulate under the bag. I have 6 little 1" tall castors underneath so I can glide it out of the way.
I have lava rock all throughout. They like structure so that seems OK. I don't use bedding personally, as I feed Bokashi (fermented plant material). The worms swarm the stuff. I started with bagged manure compost and some "active" soil. It was used soil that I planted clover in as a cover crop. Bioactive and healthy. I didn't want to start the worms in a sterile or dormant microbial environment.
I have in my basement at 62-64F. I keep the bed about as moist as I would soil. I have no runoff at all. No smell either. Unless your nose is right in it. Remarkable. I keep a loose piece of poly film laying on top. They like to crawl on the surface which stays nice and moist. I generally only water the perimiter, as the center stays moister. I only give it a shot of water in the middle on occasion. Interestingly, the only VermiCompost surface that gets dry is the outer ring, the tread on a tire. So I water the perimeter.
No fuss, no muss and this VC is really rich looking. I add crab shell meal and Neem, which is good initially for insecticidal properties, and then later for the nutrients (Ca and N) after decomposition.