For the one's that have to stay inside for the Winter, I just use regular tropical house plants, and some dandelion. None of mine ever bothered with the plants, but I can't tell you what your's will do.
I also put a lot of long fiber moss on one side for them to dig in, and some creeping jenny for a little ground cover...some leaf litter, and pine hay.
It's from a big old white pine tree in the woods near where I live. I've never had a problem with it, and it's nice and soft. I put it on top of the dried leaves where they hibernate.