This is my tub setup... almost as simple as you can get. I could do away with the hides, but she had them in her last home, so I kept them in here. Paper towel substrate, water bowl, warm/cool hide and an Accurite to measure humidity. I also have a Herpstat probe under her hot side as well as another accurate probe inside her tank under the hot side hide.
The fake foliage can be found at any big hobby store and most dollar stores.