My husband and I will be on IM from 2/2-2/9. This will be our 2nd trip to the island (1 day trip last winter from Cancun) and first time staying on the island for the week. We are considering doing a snorkeling trip to Isla Contoy. Is it worth it? I heard Captain Tony is a good one to book through? How long is the total trip? All day? How long is the boat ride? Really rough? Any information would be truly appreciated. Thanks!