Starting to plan our excursions for our Western cruise this summer. I HAVE to go snorkeling - it's something I've been wanting to do for the past 20 years or so - and I've decided on the Shipwreck & Reef snokeling at Grand Cayman. But the island tour looks really interesting, too. Is it possible to do both? Maybe the island tour first (2 hrs per DCL website) and then the snorkeling (2 1/2 hrs) after that? We've got about 6 hours on Grand Cayman (10:30-4:30) so it SOUNDS doable but is it really? Of course, since I'm a first time cruiser there's no guarantee that either excursion will still be available to me when my booking window opens so this could turn out to be a moot question.