ok, pine is better than sand. I would remove the sand and spread out the pine over the entire cage for now. Aspen or cypress is what you are going to want to replace the pine with as soon as possible.
I really like these hides sold by reptile basics:
http://www.reptilebasics.com/hide-boxes
You want a hide that fits snugly and only have 1 opening (a BP will guard the single opening. if there are multiple openings then the BP can't guard all of them making the BP feel less secure)
See if you can get this thermometer/hygrometer. They are available at Walmart for $12. They measure 2 temperatures (hot side and cool side) as well as humidity.
A heating pad isn't necessary, but if you do decide to get one keep in mind that they must be regulated by a thermoSTAT
Place the heat lamp on top of the screen top that way the BP can't come in contact with the bulb/dome