We booked Capt. Marvin's online about a month before we left for our cruise and boy let me tell you I am soooo glad we did! The tours on the ship's were packed!!! It looked like people couldn't even sit down on their boats. We had about 16 people on a 35 foot boat. Capt. Marvin was driving (Old Dude but tough as nails) !! Great trip. They had underwater divers that would video you trip and mail it to you within a few weeks. It was GREAT!! Hope this helps.