Just a suggestion - If they are "busting" shad on the surface, you could hit them with streamers like the Black Nose Dace, Bendback streamers, Black Ghost, etc. These streamers are not weighted and could be stripped in the top couple feet of water and should produce some great strikes. Colors could be combinations of black/white, gray/white, chart./white, etc. Try to size them according to the size of the bait fish they are chasing. I would think up to 3" would work great.
I have never tried this with a fly rod for them since I no longer own a bass boat, but, I would feel very confident using the streamers with a fly rod if I was going with you....
Fly fishing and fly tying are two things that I do, and when I am doing them, they are the only 2 things I think about. They clear my mind.