I ended up at Suwannee river rendezvous, (Convict Springs) Ginnie was crazy expensive for what you get, I.E. $100 a day for a family of four no sewage, yes you have water and power, but you have to use a dump station. Just me but I couldn't see spending $500 for five days camping, Suwannee River Rendezvous is something like $30 a day.
The Ginnie price included entrance fees of course, but diving fees are additional to the approx $100 a day.