We had a great day on the island, taking Mermaid out. But there was some large tropical storm (well out to sea) which gave us 15ft (no lie) swells that we beat against getting out. Of the 50 people on board, I think 2 didn't get seasick.
Once there, we had an awesome day in the sand, snorkeling diving, hermit crab races and bbq. The trip back was a little easier as we rode the swells. The Klein itself was pretty calm and collected.