We did Carnival's Southern Caribbean last spring. The ship at that time was Destiny but it is now one of the Conquest class ships. We sailed out of San Juan and hit St. Thomas, Dominica, Barbados, Antigua, St. Kitts, and St. Marten. A very busy itinerary. I believe they have dropped St. Marten for St. Lucia. I really enjoyed the eco-tours in Dominica. All the islands were beautiful.
All I ask is a tall ship and a star to steer her by; John Masefield
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014, 2016
Sail Windjammer: Mandalay 2017
Star Clippers: Royal Clipper 2015