You'll just have to play with it yourself to get your temperature because so many things can affect it. Also it may take a minute to get a proper reading, but whatever you do, set it up before you put your snake in. That way you know everything is fully dialed in.
Also with regards to RHP, I only plan to run it if I ever get my GTP(enclosure already made by a local guy) and then I made the same exact setup for my Bush Viper which I plan to get, both are arboreal though.