PDVAN-
Try an area off of Bass River which is known as simply the Fish Reef. I don't have my book in front of me now, but it is clearly marked on most charts. Also i hear that Collier's ledge off of Hyannis is great in the spring. A good squid spot too. Won't be long now. And I almost forgot. There is another reef off of harwich, I cannot remember the name, but it too is usually maked on most charts like the Segull charts. Good luck.