There are a few guys out here that do that sort of thing - perhaps they'll chime in soon.
My only catfish experience is from shore with smaller (5-10 lb max) fish in Rivers. For that i have used chicken livers on rigs that are basically scaled down fishfinder rigs (run the line through some sort of sliding sinker - like an egg sinker ) then a swivel - then a circle hook. On that circle hook, put a rancid chicken liver. If they aren't staying on the hook, use nylons to keep them together.
For bigger fish, i've heard of people using either cut fish chunks or live bait - best to catch some panfish in the lake you are fishing and use them.
Ok - that's my limited knowdlege - time for the experts to chime in....RACN where are you?