Here in NC I have had success catching flounder in the surf and inshore from the shore. The key is structure near the shore, along with moving water. I try to find areas with a ledge that has been carved by moving water. The flounder lay on this edge and wait for food to swim, or drift, by. I use a Carolina rig with live mullet or a jig on the bottom and a smaller jig or plastic bait on a dropper loop about one foot above the jig. I walk along the ledge slowly dragging the rigs...or if I don't have a long enough piece of beach to do this (tourists), I will cast out and slowly reel the rig back to me. Of course, if I had a boat or a kayak, drifting along these same types of bottom structure would be ideal as you could cover so much more territory. By the way, I have caught just as many flounder on the top lure of that double rig as on the bottom lure.