Hi momofmd, welcome to CruiseReviews! If you like snorkeling, Xel-ha is great! Dunns is a must, and you will definitely get wet. We did a half day Tulum/half day Xel-ha excursion. I really wish I had had more time in Xel-ha, but I LOVE snorkeling. The ruins were great, and the setting is beautiful, though. Zip-line in Labadee and a beach day (this is RCI's private island). They'll have a bar-b-que for you there.
Dave just returned from the Allure and will be writing a review for us, soon. I know SonnyV loved her. I haven't had the pleasure of sailing her...yet
Hope you have a marvelous time! Just be warned, cruising is addictive