65% is good you don't want it to be wet due to causing scale rot. As far as real plants ....some snakes are pretty hard on them due to rearranging their enclosures. Then you have to also remember that whatever is in there can get icky so you will have to pull everything out and clean it. I know one of mine will poo and pee all over the plants and the log. Sounds great but it is a lot of work every week to keep clean.