Roosevelt Inlet is good;work tight to the 2 jetties.Use lighter sinkers and bring pleanty of rigs.Cape Henlopen Cast and retrive a carolina style rig(fish finder rig);or wallk along the pier w/your rig;or use a bobber to drift.You can also drift your rig by using the lightest wieghts.Jigs are also good for Flounder,and if the Trout are over there you can catch them too on jigs.You can also give Indian River Inlet a try too but I haven't masterd Flounder fishing there.Any of the technques I've mentioned work almost anyware for Flatties.I've also hooked Flounder at Solomons and the Choptank piers too;but Deleware has better fishing.Minnows/squid is the best choice followed by cut spot or cut bluefish,and you can use cut fish or squid strips on buctails or certin jigs too.I hope this info answers your question
.