Well, the answer for the
Bahamas and
Caribbean would be very different answers in my mind. At the moment I own two boats. My 5-foot draft in the
Virgin Islands has never restricted me. My 4-3 draft in the Bahamas limits me all the time.
The Bahamas have a lot of shallow
water. How much this limits you depends on where you want to go and whether or not you viewing waiting for high tide to be limiting. Many places I enjoy going have limiting depths of 3.5 feet MLW. If you can't make an early afternoon HW, that means
anchoring somewhere else, and waiting until the next afternoon. Then the following day, you have to wait until afternoon to leave. I think you can see how those time restrictions can add up. Many protected places I anchored in my
trimaran are simply too shallow for overnight
anchoring in my
monohull forcing me to either miss them or
anchor further out in more exposed conditions.
If your goal is simply to
work your way through the Abacos,
Exumas and other islands on your way to the Caribbean, hitting some of the popular spots along the way, even a 6 foot draft would not be that limiting. For exploring the more out of the way places, I'd prefer 3.5 or less.