Randy, one more thing about the shad kill.
Once a good shad kill happens, the fish will likely be keyed in one them for some time.
Just because they are not coming out of the dam at that time, they still may bite shad patterns.
Once they start coming through, the fish will likely gorge themselves on shad. After that, they will be keyed on them for days.
During a big shad kill, it may be a little tough to catch them on shad patterns. Your fly has to be noticed (and chosen) over all the other real shad. And once the fish are gorged with shad, they might lay low for a while.