I spoke to a dock owner on Fork who fed them. He fed them while I sat in my boat and the catfish came up and were going crazy but he told me the same thing that Whnigt said. If you catch one they will all disappear.
there is a trick to catching surfacing catfish. fish the edge , when you hook one , let it
swim away from the school. Lead it to the backside of the dock and use a long dip net.
If you never let it splash on the surface , it will not spook the others. I used to do this with a fly rod. Channel cat seem to like the " orange comet " pattern.
MY BACKYARD , 20,000 ACRES , NO MOWING