Ginnie has rules about divers which you must follow:
-have to sign a waiver, if you are under 18 you have to have a parent or legal gaurdian there to sign it. No one else but a parent or legal gaurdian can sign. Only other option is goin gto a notary and having them notarize that a parent signed it.
-must have your certification card with you.
-only cavern and cave divers may have lights near the Devil's system. Don't even take them out--on weekends there is staff checking and they will throw you out if it looks like you intend to take the lights in the water with you. Lights can be taken by an OW diver in the Ballroom and I'd reccomend that you take atleast three-one primary, two backups.
-exit the ballroom with apprxoimately 2k psi remaining. (ie: turn your dive at thirds)
-to dive at night in the ballroom, you must have dove there once in the daylight.
Just inside there is a large rope running through part of the cavern. At any point you can see this rope, and find your way out. Flow is strong and silt is not a problem. There is cave zone in the cavern, and you should stay out of it unless you have cave training. Basically, don't go anywhere where you cannot see the daylight at the entrance.
This weekend, Ginnie will be full of drunk campers, fifteen thousand of them, and I would not advise plannign to dive. There are only so many bathhouses and they will NOT be clean. They will be cleaned several times a day but when you have 15k people drinking, it's hard to keep a bathroom clean. The water will be full of tubers, you can probably forget an easy entry into the Devil's system, even though divers have their own stairs, drunk people don't give up their spot on the stairs easily... The lines in the shop will be long (you might bein line for 30 minutes to an hour), and the place will be crowded. Come another weekend or during the week (for Memorial Day, thursday through Sunday is the busy time) and the place will be much less crowded.
Air is $5 for a single tank, $7 for doubles, entrance is $30 if you are anything short of full cave, all those prices are without tax. ($32.10 to get in with tax...)
If it were any other weekend, I'd offer to dive with you when I get off work, but this weekend the rule is "no employees are allowed to use the park for any reason that is not work related" basically, so they won't let me dive after work
And yes, divers have died in the ballroom. If you don't feel competent enough in your diving skills to survive, then don't dive. You are the only one who can make that call and your decision has extremely consequences. Not trying to scare you, but remember the golden rule of diving: anyone can call the dive at any point in time and NO other diver is allowed to criticzie for you it. If a buddy makes fun of you for calling a dive, find another buddy, and I mean that. Diving can kill you quickly and a buddy who makes you want to avoid calling a dive could contribute to your death. Remember: it's all about fun. If you aren't having fun, then stop diving, atleast for that dive.
If you want nitrox, you'll have to go up the street (CR340 to SR47) to Cave Excursions East, or to Extreme Exposure in High Springs. If you go to CEE, tell Rich I gave you directions, he knows me by username
Also, for what it is worth, July is full of plants right now... and visibility in the river seems to be improving, and from my kayak, I'd estimate it to be atleast 10 feet. Can anyone whose done a drift dive confirm that fact? To do a drift you do need a flag, and it'd be great if you'd take a lobster bag and pick up some beer bottles. Make sure you don't miss Ginnie Spring...if you do, stay on the surface and get out at the tube run exit
If you have more specific questions about the park, feel free to pm me. I work there...
(and if you need regulators, Ginnie is selling their old rental regs. $200 for a Scubapro MK2plus and I think...R190 second stages? I can't recall exactly...just rebuilt by scubapro, so they are brand new inside and only two years old outside!)