RANDY,
Bank fishing for shad is a kick! I've been going to Bonneville dam every late May, early June for the last 10 years just to fish for them. The most effective setup that I've found is the small shad dart jigs that all of the small stores in the North Bonneville, Stevenson area have for sale. I personally like the chartreuse/white combo, but any of the color combo's work when the shad are in thick. I use a 7 1/2 ft. graphite ultralight rod, with 6lb. mainline.
Get some 1/4" hollowcore lead and cut a piece about 1.5 inches long. slide it on your mainline, then tie on a small black barrel swivel. I then use about 3 ft. of 12lb. leader. This is because I release most of the shad, (except the ones I use for sturgeon bait) This allows you to grab the leader with your hand while landing the shad in the rocks. If you use a light leader also,
the shad would thrash around and break off the jig, which at 65 cents apiece can get a little expensive. Anyway, tie the shad dart on so that the knot is on the front of the eye(when hanging vertically the jig should hang down, not horizontally) Cast straight out, and slowly retrieve the dart like you would a spinner or spoon. The current can be somewhat strong, and that's why the lead is necessary. Let your lure swing down with the current, and reel in fast when you think you are getting close to the bank. The rocks are notorious lure grabbers.
It is not necessary to crowd in with everybody at the deadline, just find an open area and start fishing. Last weekend we were averaging about 50 or so shad a day. Usually, this time of year you can catch them until your tired of it. Shad fight great on the light trout tackle, and this can be a good fishery for the kids.
Good luck,
Mark