I will be going to Antigua on Royal Caribbean in January. Seeing stories like this reinforces my belief to always book excursions through the cruise line.
I have been told from people that you can book the same excursion for half the price if you book on your own.
This is one case where I would happily pay double!
Carnival Victory, 2003
Carnival Victory, 2004
RCI Explorer of the Seas, 2009
RCI Explorer of the Seas, January 2010