I have a lot of lakes around here that have rather large brown and yellow bullhead catfish but I can never catch anything bigger than 6-8 inches. I have seen stringers of them in the 2-5 pound range but no one will share the tricks.

I have seen them ripping up a trout carcass but couldn't get them to hit even a piece of trout thrown where they were eating.

What am I doing wrong? Do I have to fish them at night to get the big ones? I have tried shrimp, crawlers, red worms, stink baits, meal worms, crayfish and whatever else I could think of.