We loved YS Falls, and have been to Mayfield and Dunn's River. Ys is in my opinion the nicest. We did the Black River, Ys & Appleton's and it was a nice day, but a long bumpy ride. It depends where you are staying and what travel company you travel with, but see what they offer and if you don't like it, you could check out the Jamaica tours office. We did a trip with one of the private drivers that was previously advertised here on the forum, but since you are Newbies you are probably best to stick with a planned, organized tour. Ys is not as much of a work out as Mayfields might be. Enjoy whatever you choose.