I've looked into the misters/foggers and see very mixed reviews. That being said, it's on the list of things to try.

I'm quite interested in the under substrate idea. Adding a cap would prevent her from taking a journey I might not approve of. I do wonder... Perhaps if ran along the three sides on the side <one extra elbow or perhaps a 't' at one bend that could be capped and serve as a fill spot..but that is easy> of the enclosure with the uth and very small holes drilled into the top of it. Not sure it really needs to be covered completely. A small enough diameter pipe in black would not be very visible. Could also pack the cypress mulch along the sides to 'hide' it.

Gonna let the hamster wheel turn in this idea and perhaps make a trip to Home Depot in the morning if I can convince the hubby he needs yet another 'project'. He is already starting the designs for her 'forever tank' so will need to approach with caution .