If you know roughly where they are then the best thing to do is go there and watch the sounder for banks, and drift over banks until you find the fish. You are unlikely to find anyone (even me) giving away exact marks for a bass drift, and in any case each mark needs a notebook to say what works when and which mark works on what tide. The commercials know all that stuff as they are out nearly every day. My last trip on the Overfalls was a stunner and the most hectic part of the session and the largest bass came from a spot we happened to be over while preparing for another drift and it wasn't even a likely mark! So anything is possible - I have also blanked on the Overfalls while boats literally either side of me were taking 2 fish a drift.