I don't have much advice to give as I primarily fly fish, but Chuck gave you some sound advice!

When I used to catfish, I would just use the "3-way rig" on this website with chicken liver.

http://www.whiskerkitty.com/RiggingOptions.html

It worked better for river systems where a bobber would float away more quickly, reducing the amount of time your bait stays in the strike zone.