I brought my clubs last time and played every day. Other trips to Negril I have played only a couple of times and just rented clubs. There are different sets of clubs to rent at different prices. Some, as mentioned above, are sort of mixed sets. This is partially because the don't mind you picking through the available sets a bit to gather the clubs you want. I did this to get some stiff shafted clubs that help me keep the ball on the island.
There are nicer full sets available most of the time.
I also recommend Steacie and Sharron but my favorite caddy there in recent years has been a very nice young man name Shern (might be spelled Shurn), he is friendly, professional, and enjoyable to be around.
One last note... I don't walk that course anymore. It's perfectly walkable if you are in shape, but my legs were too shot to enjoy my tennis later in the day the last time I walked it. It's called Negril Hills for a reason.