Thinking of doing a trip to CSS. I was checking out the website for Dolphin Cove and am wondering if it is more/less expensive to book the tour (this or any) while at the resort, through the guest services person there ... has anyone who has waited to do an excursion such as these been told that the tours are "full" after they arrive at Couples? Is there a way to book in advance through the resort? I noticed that Dolphin Cove has an area where you can reserve and pay for your time through their website but then who takes care of your transfers? Loaded questions, I know. Thanks for any help.