Last year I just called the park office and got signed up for the antler hunt. I thought it was fun, but for me it was a one time deal. My buddies and I found several nice whites, and there were some big browns picked up, but once was enough for me. That island got combed and I think a large chunk of the whites got picked up last spring. There are about 400 deer on the island, half of them are bucks, so there are about 400 brown antlers out there. Of those 400, some are small, and some are big. 400 antlers might sound like a lot, but when you can't really scout and don't know where the deer dropped and you take off on a 42 square mile island and hope you might run into some 400 suddenly doesn't seem like that much. You never know though, you might find a 200"+ set. Good luck to you.
Dax