at Sealine.   So possibly it could be the resorts you were seeing.   I was there a few weekends ago.  The resorts had several going,  some idiot was going inbetween them (they had little kids on them)  about 100 miles per hour.  There was also a boat or two there.   I couldn't tell if it belonged to the resort or not.

Call Sealine and ask them your questions.