Reddit mentions of SE Assorted Color Plastic Spring Clamps (30-Pack) - 3273SC30-COL

Depends on the boat a bit - if you are on a Blackbeard's trip, you need to pare it down a lot, because you won't have any place to store much personal stuff.

On the other hand, if you are on the AquaCat or the Juliet, you will have more space and more room for your stuff.

I like having 2 bathing suits so I can swap a dry one for a wet one. I also learned to bring spring clamps like these. You can hang your wetsuit, towel or wet bathing suit from the railing or rigging and not worry about losing it in the wind. If you forget, check the sand under the boat when you dive - I've recovered quite a few and put them back in service. People drop them into the water frequently. A dive site that gets visited 4-5 times a week will probably have some lost items in the sand under the mooring site.

Really, a couple of bathing suits, a couple of t-shirts, a pair of 'convertible' pants with zip-off legs that convert to shorts should be all you will wear on the boat.

November can be 'iffy' in the Bahamas. It will most probably be in the low 80's, but it's possible to get a cold front that drops the temps into the low 70's or even high 60's. NBD, but you might want a light jacket or hoodie to take the chill off after a couple of dives on a cooler day.

Bring a book to read during surface intervals. Reef-friendly sunscreen, a ball cap, sunglasses, and a pair of compact binoculars are nice to have on board. Non-marking deck shoes are ok, but sandals (i.e. flip-flops or thongs depending on where you are from) are the only footware I use on-board.

I've done a few live-aboard trips in the Bahamas and the Turks and Caicos. PM me if you have any specific questions.