So I buy either those packaged minnows, or freshly deceased minnows. Use a much smaller hook than what you use in the summer. Try, if you can, to use a smaller lb-test line to avoid spooking them. I have a lot of fun with this method, and I usually attract pike, bass, and other fish besides catfish. The perfect hook.
Trebble hooks are useful, but are very hard to take out of a catfish mouth.
I came up with a way to enjoy the benefits of trebbles, without the hassle. Then, use a twisty-tie that you use for bags, and twist the hooks together. After hooking a fish with this method, simply untie the twisty-tie, and remove each hook individually. This is great for chicken livers and doughballs. In many lakes, a muddy, or clay bottom is found.