The heat pad needs to go UNDER the tank and cover about 1/3 of the tank. That NEEDS to be hooked up to a thermostat. I would recommend either a Herpstat or if that is not in your price range, then go with something like this: http://www.amazon.com/Hydrofarm-MTPR.../dp/B000NZZG3S

As for the heat lamp, since BPs aren't really basking animals, you don't need the heat lamp unless the ambient temperature (aka air temp) is too low. That heat lamp will suck out the humidity and it will be REALLY difficult to keep it humid enough in the enclosure, especially if you live in a dry climate. If you really want to use the heat lamp, make sure you cover most of the lid with aluminum foil or a damp towel. As for how long to leave it on, since it's really not necessary, it doesn't matter how long you leave it on. Now, you'll need to keep in mind that if you do use the heat lamp, it will generate a lot of heat. I have one for a corn snake in my bedroom at home and my room is always 82+ degrees in there and I only run my lamp from 7am-7pm.

The water dish doesn't need to be big since BPs shouldn't soak. If they do soak, they probably have mites. You only need a small water dish.

As for the hides, the log hides do not offer enough security for a BP. You need something that is snug on them. Half of my tubs on my rack are using old butter-containers, glove/tissue boxes, etc. I just cut a hole in them. You want something that is inclosed with only one way in or out. A lot of people use the black hides from companies like Reptile Basics. I just use whatever I have around my house. The snakes don't seem to care! Try to have two identical hides - one on the hot side one on the cold. This will encourage them to thermoregulate and not choose their favorite hide over thermoregulating.

I hope that helps you a little bit.