Clyde's behavior doesn't sound too troubling and I think she'll be fine. If she's still gong for hornworms then she still has an appetite. As for the laybox, make a smaller one that fits right in her tank. A plastic sterilte or rubber maid about 20" long, 10" wide and 7" high. You can find those at office supply, Walmart, etc.
Fill it about 3/4 with the damp sand/soil, cut a corner out of the lid to act as an entrance and put it in the cool side of the tank, around 80 -82 degrees .
Fill it about 3/4 with the damp sand/soil, cut a corner out of the lid to act as an entrance and put it in the cool side of the tank, around 80 -82 degrees .