Hi Tat, sorry for the delay. Have never been on any of those. But, only one I would have the slightest concern of not having enough people is the Rafting, but mind you I have never been to Montego Bay. The Catamarans usually sell out, and only worry would be weather for cancellation. And weather with the Ruins as is a popular tour, the ship use to make a seperate stop for that tour I think Playa del Carmen..but don't have a book handy. I want to do that someday, but I like to snorkel. Also I want to correct something in my previous post about checking at the Shore Tours Desk. They might not have that info. upon boardiing because they give a Shore Tours Talk in the big showplace, and alot of people sign up there. It will be listed in the Welcome Aboard Caper. And I have seen people the night before a port deciding what to do, and some were sold out. I have had only one tour not go because of not enough people, was Dominica snorkel something, but the night before they left a note to call the information desk. They gave me a choice of refund or said the Scuba tour would take us for same price and provide a guide. It worked out great 14 Divers and 6 Snokelers and the guide stayed right with us and showed us things we would have never seen on the other tour. Plus was my first open water snorkel and got to talk with all the Divers. It was a big upgrade with the guide and drinks. Please keep posting here I am real interested about your Montego Bay and how long the bus ride is back from the Ruins.
Best to you,