We have been to Jamaica twice with kids and are going back for spring break this year. My kids are teens, but when we were last there 3 years ago we did warn them about the people offering drugs, etc.....we only went off resort with a private driver. He took us to Dunns River falls, Mystic mountain and then fern gully & to a sugar can field to taste some fresh cane.
This was our only off property tour. We were only there 6 days and spent most of the time at the resort. My son (about 13 at the time) was offered ganja, but not my daughters (10 & 15).