Sorry to hear about your slow day......at least you were fishing in some beautiful areas. They should only get better as the season progresses towards the fall migrations.
I know what you mean about the size of the shad off of the Wall. I've taken some there that exceeded 20" and made me wonder what the heck they were until they jumped.
My schedule clears up a bit around Labor Day weekend. Maybe we can hook up for a trip over there sometime afterwards.