Hey Clarity,
I just returned last week and made a trip to YS, sidestepped over to Bamboo Ave, hit the Black River to catch a boat to Pelican, and made it back to Negril with some light to spare. We left at 9am and made numerous food and beer stops. Spent probably an hour at YS, 2 at Pelican, and the rest was the drive and stops. Paid a well known driver $120 for the day plus tip. It was for my wife's b-day and she was stoked as was I. Bring water shoes to YS if you want to swing from the rope like Tarzan and Jane. They provide hand protection and tell you where to land. Just don't hold on too long. LOL
If you want to hit a local yard and have a killer meal, some cold beers, and just chill and be entertained by a Jamaican family, I would recommend Percy's which is my guess 15-20 minutes from 7 mile. Play some dominoes, take a river raft ride, catch some fish, lie in a hammock, etc. You could tie in Half Moon Beach as well which is a great place to chill with cold beer and great dogs, and a great host. This was a great day as well.