LatinAngler, I have not fished in Barbados, but I have in many other Caribbean Islands. Some things I would suggest as general rules would be:
1. Before you go, find out what's running in that area. One source for this I think is the Salt Water Sportsman, they have a section on best spots for gamefish at any given time on the calendar.
2. Try and do your homework before you get there about what boats to charter. Most of the "Captains" down there are not really captains. Any of the locals can just start a charter fishing business with little to no regulation. Also, check to see by asking for a copy of their certificate, if they have any insurance, 99% of them do not.
3. The caribbean is very, very slow right now with tourists, in most cases, you will not have to pay the price they tell you up front. They are very negoitable.
4. Go see the boat before you charter, meet the "captain". Check the fishing equipment, is the line 6 years old, etc., etc. Ask and see for yourself what safety equipment he has on board. Most of these guys are not slaves to maintenance.
Most of these guys are not in it for the repeat business. They make their money on clients they will probably never see again. If you don't know any better, they will often times just take you for a boat ride trolling around an inshore area so as not to burn too much fuel, something that is very expensive down there.
There are still pirates in the Caribbean, be wary!!!