Bravura does day sails from Leverick and sunset cruises - all catered. Great boat and Captain.
I've neve bern to the Sand Box, even tough we look directly at it from our home.
Every time we have sailed by, it has been closed. I was once told that you could call them and they would ferry you over and back. Not sure if they are still doing that. The beaches on the other side of Prickley Pear are beautiful and the snorkeling is very interesting.