Worms are the best bait for anything in the Willamette, but if you plunk one on the bottom, the Sculpin will make short work of it, along with Squawfish, but atleast the Squawfish have a bit more size to them then a Sculpin. If you drift fish a half or whole nightcrawler and bump bottom a couple times per drift, you are bound to pick up something worthwhile. I've caught monster suckers drifting a stick float (of all things) and a worm rigged deep enough to tap bottom a couple times, Smallmouths won't resist it either. Twitching a Crawler slowly close to bottom in slacker water will work just as good.
The spot where Pringle Creek dumps in has been visited by me many, many, times last year. White Bread, Corn, Liver, and dead minnows (Shiners) are all reliable baits in that area, especially for big Squawfish, Suckers will take the corn and bread, Idk about Liver (I wouldn't doubt it).