I think I'll be doing an experiment. One bin will have the loose bedding and the second will have water bottles laid on the bedding. I'll see which worm bin produces the vermicompost faster and which one reproduces quicker. I'll let you know if there's any noticable difference.

Worms like to congragate under things. I used to gather fishing worms by looking under things like rocks, plywood, or anything else lying flat on the ground. I now use about 6 layers of burlap over my outdoor bin and the worms are always huddled up when I peel back the layers. I always fluff the bin when I feed! Good luck with the experiment and keep us posted.