i was noticing in some of the pictures of the beaches that it looks like there are sections of the water that are roped off, as if to tell you that you can't swim beyond that line. I was wondering if that is the case because my boyfriend and I are strong swimmers and like to snorkel (without having to go on the excursion) and it doesn't seem like the roped-off section of the beach is terribly large at any of the resorts. Some insight for those who have been there would be appreciated!