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...
1984 Fast/Nicholson 345 "FastForward"
".. 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)