While Brad's super baits will work, I've never found them to be near as good as a real bait. If I were you, I'd pick up a dozen herring and brine them up the night before. Squirt some anchovy oil in the brine and/or crush up an anchovy with the herring. Rig the herring as a choked herring (here's a good video on that - https://www.youtube.com/watch?v=P7tXyJTngXc). Troll those behind a rotating flasher and diver or with a rotating flasher and a dropper weight. Stick with it until you catch a fish. I can guarantee that such a setup will catch salmon in most any river that has a salmon run and it's probably the most common way to catch salmon in the Columbia.

Fishing in a river, the bites often happen in little "episodes" as schools come through. Thus any gear you use will often go without a touch for an hour or two or more. If you switch between different types of gear, a) Your line is out of the water while switching and b) you may have switched from gear that is more productive to something that is less productive just because the fish weren't there at the time. Then when the "bite" is on, you've got crap in the water that has a low probability of a catch. Day in and day out, a good herring with a little anchovy scent behind a rotating flasher has a high probability of catching. Stick with that until you get fish. I will say that some flasher/diver combos work better than others so it's sometimes worth swapping flashers around.