We do not have any problem with the temps in the enclosure. He moves around to where he is comfortable but we are always checking the temps with our heat gun. The humidity is also not an issue and we do not get water spots on the glass. The misting system we use sprays the water so fine that by the time it hits the glass it is next to nothing. But it does spray down the tank where needed. We also use distilled water for him.
One thing to remember have the enclosure set up before you purchase the snake. Make sure the humidity and temps are all stable. Do yourself a favor buy from a reputable breeder not someone at a show that has them sitting in the bottom of container on a wet paper towel. Make sure you know who you are buying from and spend a little more money for CBB.