I can't believe so many people are cancelling. We had several that contemplated it but only 2 that actually did (& it was a mother and 10 year old). I'm crossing my fingers that everyone gets on the plane tomorrow. We'll see! I'm not worried. The resort won't be nearly as crowded and our chances of being upgraded to a suite are excellent. We're trying to focus on everything positive about the situation.
With several weeks to go you have a lot of choices. Obviously I think you should do what you want. Have you contacted your hotel/resort? We are working with the Occidental Grand Cozumel and they have been awesome. They gave us the option to change our date or switch our entire group to another location (DR, Aruba, etc). We just didn't have time to really think about it with our wedding being this Friday, May 1st. Our resort is now offering full refunds to anyone in our party that wants to cancel. If you haven't called your's, you should. Its always good to know your options.
Good Luck!