Re: Maximum draft
We've sailed from St Maarten to Grenada on a boat that drew 7 feet without issue.. we did have to pay a little more attention in areas like the Tobago cays and Barbuda, but generally anchored in 4-6 meters (12- 20 feet) most places. Beach access by dinghy was only an issue on Saba due to lack of shelter and a running swell.
Other than anchorages you're usually in pretty deep water...
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"