Hello FloridaMac, My family took a tour with Real Tours Jamaica and had a great time, I wrote a review in this forum. One of their mini buses can take your entire party. They have activities on their website, I would suggest calling them for suggestions or a custom itinerary (they might know of a water tour). Our tour guide, Norris, mentioned he has done multi full-day tours where he picked up a family from where they were staying each morning.
Cheers.