Yes,you still put a worm on your harnesses if casting or trolling.A good length leader is 6-7 ft long.We have been using a #2 tadpole sinker/ diver from offshore with our harnesses last several weeks.Best leads had been 60-80 with 80 being the best.Last Sunday had to fish them at 120 after that Saturday blow.We also use a 3 oz sinker to fish even deeper if needed.