I am setting up a 18x18x24 inch terrarium with a waterfall and fogger for a high humidity environment. My original plan was to house my dream snakes (ahaetulla prasina) but I have since decided to wait on them until I can build a larger (6 foot) enclosure for them. What do I do with this terrarium now? What are some non-venomous snakes (preferably arboreal or semi-arboreal) that would thrive in an 80% humidity environment of this physical size? Prefer not to have another python/boa.

Could a rough green snake inhabit this cage? I might do that and just not use the fogger.