Hi goducks, welcome to CruiseReviews! We did the America's Cup sailing in St. Maarten. It was a blast. I had planned on snorkeling in Mazatlan, but if it's cancelled, then we'll go snorkeling in another port. It will just be a new itinerary for us since we normally do the Caribbean. I'm looking forward to the cruise, Mazatlan or not:)
I hope you and your wife have a marvelous cruise in September!