Figure out what the main food source is and fish it. Would consider the rocks as a starting point, look like you're into a lot of running and gunning until you figure it out. Even a small mucky area could be a magnet they'll at least pass by on their rounds. They move, just need to figure the pattern and preferences. Shallow weeds early and late season are worth investigating, looks like you're in for a busy season. Good luck and stay at it