Yup. The good thing about Case, Loyola, and Tulane is that they don't require any $ down to hold a seat. Tulane wants $500, but not until May 15 when you decide you want to go there for sure.
I think most places give you three weeks to reply that you want to hold a spot, but there is really no penalty (other than a small deposit at some places) for replying "yes" and then giving up the spot in May if you are accepted someplace else you prefer. That's why all the waitlists move significantly in may.