You have made me want to take that long drive down to Grand Isle again and start it on an empty stomach. I can just imagine a day long culinary journey eating my way down to the coast. I have often found that when you get out of the city the best source of info on where to eat is the locals. Go into a barbershop or a busy gas station and ask, if there are several people there you will likely get several answers. If you really want to be sure ask at a few places, if the same name keeps coming up you have a winner.