Better late than never..
I'd have her sit in the vision cage. It's a much more comfortable place for her to be and you don't really want her cramped. Also, it just makes it nicer for her to be able to pick a place to lay eggs if she's about to do so. You might think of doing a 50/50 split in the vision cage with your regular substrate and then something a little more humid in the other half. More than likely, though, she'll pick the corner you gave no thought towards and left bare.
I know your original post was just about two months ago so how did she do and what did you end up doing with her? Any eggs?
Hope all went well.