I'm still at the glass terrarium stage too, but I'm on the edge of needing a rack. To answer you questions yes, with heat tape mounted under the back of the tubs or down the back wall of the rack, and a thermostat it is easily kept warm enough. A 90+ degree hot/80+ degree cool side is not at all hard to maintain. And ambient air temps generally stay up. As far as "basking" the snake will move from the warm to cool side as it desires. Since there are only a few holes drilled in the tubs for ventilation they hold humidity very well. Some use paper, paper towels, or a substrate. It all depends on your ambient humidity and what you need to do to keep it up in your rack. Just like with glass terrariums you will need to upgrade your rack size as your snakes grow. Hobbyist breeders generally have at least 2 racks. One for the breeders snakes and one for the hatchlings with at least a couple different sized tubs. Some people with racks still use hides, but many don't. It's just a plastic drawer with a water paper towels and a water bowl. Anyone else feel free to add to my knowledge. Also you can do a search on YouTube for almost anything involving reptile breeding and you'll see many people's racks of all kinds. This is just what I know, and I don't even have a rack . . . .yet.