annmarie,
Treasure Beach is by far more laid back than Negril. Lot's of options from camping to top shelf accommodations depends on lots of criteria. Check this site for a little help http://www.treasurebeach.net/guide/.
The Treasure Beach Hotel back in the days was a very interesting hotel catering to a large degree, nudists. I have no idea what their theme is now but I too have heard less than ultra positive feeback. Having never stayed there I could be completely wrong.
I can recommend Sunset Resort And Villa's http://www.sunsetresort.com/#!/
Very nice spot a few doors down from TBH, clean, fairly priced and well staffed. Owned by an American man and his Jamaican wife.