Agree Less is better. But we have taken down several large duffle bags with "stuff" to leave on our boat/ at base. Snorkel gear can go with all your clothing as well as inflatable PFDs in 1 appropriate duffle bag. Perhaps a second duffle. Carry on any electronics. Good luck... If needing more, charter a plane... put it on with you and it rides with you.
I am flying to Tortola in March and again May in my airplane.