I've been to Glistening Waters in Falmouth several times. I would recommend staying the night in Fallmouth after your excursion, and drive back to Negril the next morning. There's a 3star hotel right next to Glistening Waters called Fisherman's Inn. That way you can shower and relax after your tour. There is a fellow named Mooney in Fallmouth who will take you on a private boat excursion on the bay if you'd prefer not to go with the cattle-drive boat. Mooney can also alert you to some fine Jamaican yard food in Fallmouth. If you do spend the night in Fallmouth, you might try to plan your trip so that you can hit the Fallmouth Market day in the morning. (sorry, can't remember which day of the week the market day is). On your ride back to Negril, you'll be driving right by Scotchies Jerk Center before you get to Montego Bay ..... It's definitely worth your while to stop for some of their famous jerk, breadfruit, yam, etc.