If you have a guest bed that doesn't get used a lot, just layer your quilts on the extra bed flat. Then you don't have to worry about the quilts getting creases. If your worried about anything getting on the quilts like dog/cat fur, or dust/dirt, or too much sunlight, just throw an old quilt or comforter over them.
I know that is what I would do if I had a stack of extra quilts. (Which I don't right now. But, I'm working on it.
) I'm lucky, I have the perfect guest room to do this with.