Happy to assist. For Barbados - Take a wonderful limited 12 maximum pax large Cat sail, including lunch, drinks, swim, snorkel, etc., etc with.
https://www.elegancebarbados.com
or
https://silvermoonbarbados.com
or
https://calypsocruisesbarbados.com
Note to self… Check out start times of each operator to fit one’s docking times
I just snorkelling, then - https://www.tranquilitycruises.com
Book early as popular with island holiday makers, in addition to cruisers.
For other Caribbean islands, switch over to the applicable island on CC for various threads with information.
Specific questions can also be answered there, rather than under Cunard.