Once you cross over the bridge to actually be on the island of grand isle, there is a marina called Bridgeside. It is at the bottom of the bridge on the left. You can buy live bait there. Once you get your bait, take a right out of bridgeside and all the way down the island there are places where you can pull off on the right side of the road. Walk over the levee and the beach is right there. If you want to fish 'the rocks' you'd have to go about half way down the island to the Sureway grocery store, the rocks start somewhere around there and run parallel to the beach for quite a ways. You don't actually have to fish the rocks to catch fish, but the structure does hold bait. Good luck and let us know how you do.