If you're going to Ocho Rios, I suggest booking a tubing trip down the White River. Absolutuely unforgettable! As long as your excursion is leaving from the terminal area, you should have no problems, but heaven help you if you venture outside the security sector on foot. DW and I made the mistake of venturing out to take in the local color after returning from the tubing thing. Bad move. We were instantly set upon by a throng of Rasta-types asking us how much dope we wanted to buy, and these dudes just do not take "No, thank you" for an answer. All this under the watchful eye of Jamaicas finest. I suppose if we were knifed to a bloody mass they might have come to our aid eventually.
If you're committed to going , do the White River thing, but be safe!