OOOOO there are a ton of different ferns for you to choose from like the Oak Leaf Fern, Himalayan Maiden hair fern. Those are some of the ones I have seen while researching plants for my viv. I'm in no way a plant expert so hopefully someone more knowledgeable will come along with some specific ferns for you to check out.

For places for them to hide you could try those little coconut huts.

Ally