We did it last year, and if you like birds, you'll have a great time. We went on a day when we had friends coming in on an early afternoon flight, so we chartered a van, picked them up and went directly to Rocklands. I know you've had posts talking about the ride to Negril from MoBay, and you might want to consider arranging to have someone take you directly to Rocklands when you arrive, to save the round trip driving on another day. It's a lot closer to MoBay than it is to Negril!