The Jazz Festival weekends tend not to be too busy at the Dive Park because hotel rooms and boats are often booked as has been pointed out. As Arnaud said, you get some great music during your surface intervals! The Dive Park itself has been slow much of this summer/fall compared to previous years. Yesterday there were just a few divers (several of them local) in the Park when I went there. There will be crowds ion town and probably more foot traffic around the Park due to Festival attendees, but if you can get here it should be a good time to dive. I'm heading down in an hour or two and will try to offer a report based on this weekend's experience.
Dr. Bill