go to
www.chondroweb.com and read Greg Maxwell's locality debate. It's very interesting, and may change your mind about a few things. Also, join
www.chondroforum.com, if you have any other questions..there are a lot of top breeders on that site that can help.
I am still researching GTPs, as I plan to get my first pair in a few months. My enclosures will be 22inchx22inchx22inch arcylic. From what I've read and talked about with breeders, to get the humidity up, you should spray for like 10-15 minutes in the morning/early afternoon, and then allow for a "drying out" period at night..and then respray again in the morning. They don't need constant high humidity, just a big spike during the day. Hope this helps!