Several trips back we called our friend Vincent (Famous Vincent) to do just that. We chartered his boat (very reasonable) for a day he had no one booked to go to the reef. Vincent picked us up at Catcha went up past the light house to see the caves, cruised back down along the beach and put in at Cosmo's (boy, I miss that place) for lunch. Stopped in at Kuyaba for coconut pie and coffee, encountered a woman and her son there who were about to go for a taxi to their hotel. Instead we gave them a lift up to their place on our way back to Catcha. It was a sublime afternoon. I didn't realize anything went fast in Negril except those annoying motorcycles and jet skis. Hope this helps give you some ideas. Respect.