Hi MilwaukeeMike,
Negril unfortunately has turned into a crowed tourist destination unlike the sleepy little town from the 70's but I'm sure Milwaukee is different now too. Treasure Beach has so many options to choose from and yet it still has a small town way about it and yes the vibes are much like they were years ago in Negril. I have found an area in the Blue Mountains that is really nice, up the road from Buff Bay in Portland. It's about 3000 feet above sea level, obviously no beach but fresh water streams, waterfalls, coffee plantations, very green and cool nights. People are old Jamaican friendly, no problems. A nice change from the sea scene. Fly into Kingston and rent a car (very inexpensive) and drive to Portland, maybe 2 hour ride. Treasure Beach about a 4 hour ride along the South Coast. Jamaica is more than a beach it's an island!!