I as well saw alot of dead fish last fall. Up to a hundred in "sailboat" cove across from penninsula. The best hyprid fishing i have had a barren was in late march from sunset till midnight. I always fished across from penninsula, where the new boat ramp is. In both of those coves and points with a red-fin. Caught several in the 8lb range.
In the summer I have always caught them anchored on "hogback" in about 16 feet of water using crappie lights and night crawlers fished about 1 foot off the bottom. You can also have good luck between the two islands by baileys point. If you can get your boat in there. It feels up with boats fast on the flat when they are there.