Shad, Threadfin and Gizzard, can be surprisingly tough. First, do not use a cast net as that is hard on almost any type of fish. Look into setting up a lift net and do not pull it up far enough to get fish out of water. You could also use a seine in a similar manner. You can crowd the shad from net into a bucket of water and move quickly to new location. Even consider using liberal amounts of salt on fish while you are moving or otherwise holding them. I cheat using compressed O2, but that is not needed if you keep the density of fish during shipment low and of short duration.
Are you familiar with the concept of "deadmen" or "shepherds hooks"?
