Love that place - was just there this past Wednesday. There are numerous tour operators who will take you there but if you are staying in Negril, it is a drive so most recommend doing the Black River boat tour or something else in the area (we did YS Falls, Bamboo Ave and then Pelican). Also, if you don't want to go with a group of people, it is very easy to find a local taxi driver to take you at a fairly decent price. I know when I went the first time to Pelican (March 2010) we used one of the local tour groups and also went to Black River and I believe it was about $80 or so (which was a price that was negotiated down) plus. This time around I had a local friend drive us.