My husband and I did the jet ski tour on CocoCay last year. We had a lot of fun! Yes you do "follow the leader". We did stop at different islands and our guide told us some interesting facts about the island. If you liked to go fast, you're at the front of the line. Slow pokes at the rear.
My only suggestion if you decide to go is for everyone to get their own ski. I got cheap and rode with my husband. NEVER AGAIN! It was so hard to hold on. I nearly fell off the skis numerous times.