Trying to firm up a reservation with Capt. Marvin's for 6 adults, 6 young teens and a 7 year old. The group has left the decision to me and I'm having a hard time deciding between the 1/2 day Excursion 10:00 - 1:00 p.m. (Stingray City sandbar, snorkel at Coral Gardens and Barrier Reef) or their Short Excursion 11:15 - 1:15 p.m.(Stingray City sandbar and snorkel at Barrier Reef or Coral Gardens). They also offer the Short Excursion from 8:30 - 10:30 a.m, but I'm concerned that we may not have enough time to get everyone on the tender and over to the location by the 8:00 check-in time. Any reviews, help, or suggestions on either excursion would be most appreciated. Thanks.