We have been down in May the past two years and it wasn't bad getting a mooring ball anyplace. We have been there a couple of times at Easter time and it was more crowded than May. Last year we were down the same week as MIT and they weren't any problems at all we only ran into them at the North Sound area other than that we didn't notice them at all. I usually try to get to my mooring spot between noon and 2ish so we can do some swimming, snorkeling and happy hours. Looking forward to May 18th when we arrive.