If you are diving at Nassau, the operator most of the cruise lines use is "Stuart Cove’s." They have good equipment they rent to the tourists. First time I went, I took nothing and rented everything. No issues. I did one trip where I took everything except weights and tank. Pretty much sucked dragging that stuff from the pier on the little shuttle bus, back to the port and through customs. I also did one where I only took mask, fins, booties, safety sausage and a shorty. It really depends on what you feel like lugging around and how much extra room you have in your luggage. The mask, fins, booties, shorty was the nicest for me. I had a mask that I knew fit and I like my fins, but I didn’t have to lug that stainless steel black plate and reg set with me everywhere. The shorty was useless on one trip because we were doing the shark dive and they insist you wear full wetsuits for that, so I ended up renting that.