My favorite creek catfish method is to use cut bait. Catch a couple bluegill (out of a farm pond if you need to) and cut 1" square sections out of the flesh. Avoid the fins. Put them on a 2/0 to 4/0 circle hook under an unpegged bullet sinker. Faster the current, bigger the sinker.
There's lots of other ways to rig for catfish, that's my favorite way though.