I don't think the boulders are as much a problem as the possibility of the corrugated roofs from the homes and hotels that might be in the water. It is those unknowns that concern me the most. I can always remember the weird objects that snorkelers would bring up from even Orient Beach. Gotta believe that there is quite a lot of trash that has not been removed. Our friend lost her washing machine which was outside on her porch and has never found it so ........