We have been to Jamaica 16 times / 14 at Couples. I strongly recommend CTI. We have not stayed at CN, but have stayed in another resort on the beach at Negril. Seven mile beach is spectacular, but not the best for AN. This due to it being a public beach. So many that we have met on the island tell us about anyone being able to walk by at CN. We do not care, but if you are new and still do, CTI for sure!
The boat goes back and forth to the island as often as you want. You just stand at the dock on the pier or at the island and it will come.
You will feel very comfortable on the island, we have met lifelong friends. As a newbie, you can first go the right when you get off the boat, which is more private. If you want to stay on that side you can. But in short time you will be in the pool having a blast. I bet money on it.
Please let us know if we can help further?
PS, we have met British couples on the island on every stay.
Mi love fi binaked inna Jamaica
(Patois for: I Love To Be Naked in Jamaica / At the island or SSB Mon!)