Blue Hole outside of Negril...? Good day trip?

Posts are talking about 2 different Blue Holes - one near Brighton, one at Roaring River.
I've been to the one near Brighton - and yes, it is worth a few hours visit IMHO. http://blueholejamaica.ning.com/
Besides the Blue Hole, it has a nice pool, bar, clean bathrooms, and a volleyball court.
Most taxi drivers in Negril will know the way.
I don't know the whole route, but easiest is to take the A2 toward Sav. About 5miles out of Negril you take a right on the road where the Bike Stand is. From there, you'll have to ask - but I think there were a few signs, too.