Wilhelm crappies

I have fished the lake for years and always had great success in the fall. Lately I can't seem to find more than a few really small fish. Doe's anyone know what's the problem. Normally we fished the deeper water towards the dam and close to the creek channel. I will appreciate any info or advise.

No blame the gizzard shad and possibly the guy who dumped his bait bucket into the lake... The amish on this lake in the last 6 years is nothing The amish that I see are bank anglers and in row boats. It is kind of simple if you put to many cows in a field then none get fat the lake can only support X amount of bio mass per acre competeing for the same food source.
 
But Bass and muskie anglers rejoice as the shad provide a food source that grows many large bass and muskies to 50 inches and fat walleyes.
 
JMO in response to your post   

Thanks for the input. I had heard stories about gizzard shad so I guess that is the problem. Maybe I'll just look for walleyes at Wilhelm and find another lake for crappies.