Sounds like this is going to be the horde. I'd probably pull up and watch just for the entertainment value - with that many divers its gotta be sorta like a boat launch on the 4th of July.
Surely the plan is not for 36 to descend on a dive site...
I doubt they'll be diving as a group the entire time, but the scene described below was the basis for my previous comment.
The dive leader is thinking about dividing the group into 2 smaller groups, starting at 2 different entries & meeting in the middle.
You'll want to arrive early to get a good seat for the show.