What are you measuring your temps with? if it is those stick on dial thermometers, chances are your temps are already too hot and your humidity is fine. If you can I would try to find an accurite thermometer hygrometer combo unit. You can find these at walmart, the home depot, or lowes. They look like this: http://www.weatherconnection.com/scr...91p.gif&type=p
Also, you most likely don't have a rheostat or a thermostat working with the UTH to keep it at a safe temperature. You must must must control all of your heat sources because if you don't you could burn or cook your snake, and that is no good ):
Reptilebasics.com sells some nice thermostats for around $80. It is expensive, but it is pretty necessary. Reptilesupply.com also carries a more mainstream dial thermostat. I have used one in the past and they work pretty well. They aren't perfect, but they will get the job done.
As for hides, basically and plastic container that is opaque is good. Just cut a small opening and you are good to go. Make sure your BP fits snugly inside. I would recommend getting two identical hides, one on top of the UTH and one on the other side of the enclosure. Then you can just stick the water bowl in between them.