I've camped on Grape before, but I wouldn't say it is the best for fishing. I'd try Peddocks. Lots of rocky shoreline and deep water nearby (Hull Gut). Lots of poison ivy, ticks, and rodents on all the islands.
Thanks for all of your input. So far I've found out that the islands are loaded with poison ivy, rodents and ticks...Either that is true or the islands are LOADED with fat, hungry stripers!! What is a man to do??? Ha! Thanks again for the input guys.