Interested in snorkeling trip to Hol Chan marine preserve. Carnival Dream shore time 9 hours first week of August. How long does it take to tender? Can anyone recommend 6-7 hour snorkel trip to Hol Chan preserve that includes sharks, stingrays, and trip to Caye Caulker for party of 7? Coral Breeze tour is only 4 hour 45 minutes and goes to edge of preserve. Looking for something longer that actually goes to preserve.