there's a huge ferry that goes to ship island already. on special days they could easily increase their runs. I agree the casinos probably wouldn't care enough to get it done, but having a big party out there would bring a lot of local regional people to the coast for the party. You have USA, Tulane, LSU, USM, State, Ole Miss, New Orleans, Mobile, Baton Rouge, Slidell, Jackson, and more within a few hours of there. Done right, it could be a huge blowout, but without places to stay there or something other than sand and water, it won't work.