Even though I have not yet been to AC, I have read many, many posts on this board and I have fished in other Caribbean locations. I would HIGHLY recommend a professional guide who has all the proper safety equipment and a good reputation. I would not go out with just some random person who offers to take you out. It could be a recipe for disaster. All you need to do is ask at your Hotel, resort, whatever and they should be able to steer you in the right direction.
Can not wait to reset my watch to "Island Time" on Friday!! Wait.... what watch? It is staying home!