I'll for sure look into the peat moss. It being able to dry despite the wet ground would be great. Especially for a dust bath, I use sand but they often have difficulty bathing in it since it's not that dry. Thanks for the suggestion!
I use peat moss for the dust bath - it works great if you can keep it completely dry. But if it gets waterlogged it takes forever to dry out (which is why it's used in gardening, it holds onto water very well).
Because of all the rain we get, my dust bath is fully enclosed and only opened up on dry days.