A word of caution... we wasted a day trying to dive at Blue Hole in Florida Caverns State Park. Turns out they do not allow scuba diving. In fact, the attendant called her manager and it sounded like they haven't allowed diving in recent memory, in spite of what DeLoach's book said.
When we spoke with the people at Diver's Den in Dotham, AL, they laughed and said that the book had quite a bit of misinformation. Some landowners now greet would-be divers with rifles!
So I would suggest call first before making a special trip!
While we are at it, Morrison Springs is now state owned, there is no fee, and there are no amenities other than a bathroom (bring a light and toilet paper), a rinse site, and a lovely pavillion. No camping, no concessions, no air fills, in spite of what DeLoach says.