Bottom bouncing is a perfectly acceptable setup for fishing the Vedder, but keep your leaders short and fish with jensen eggs or roe, anything that will elicit a fish to bite at your offering. If your bottom bouncing with a 15 foot leader, it's clear what your intentions are. People will go out of their way to snag you up (myself included) if you are flossing the run. There are plenty of ways to fish the various runs without flossing that will produce fish.
Spoons, spinners will hammer coho and springs under the right conditions. Floating a big gob of roe is always a good bet for salmon. I've almost lost my rod numerous times floating a small jig under a float in calm water.
Look for risers, I was on the river at 6:00am this morning and the river was boiling with fish jumping, I waded to the spot I wanted to fish from and probably spooked 5 fish right at first light.
My personal opinion is, in river conditions like right now (high) salmon will be on the move as the increase in water discharge combined with the dirtier water give them the green light to head up river. I caught fish 5 feet off shore yesterday in the brownish high water. Focus on finding travel lanes and presenting your offering to the fish. Once you find the lane, game on.
When the river drops and clears up, you'll find salmon stacking up in the pools a lot more and they may be more skittish. Time to throw everything but the kitchen sink at them. Give them something they haven't seen before. You'll be surprised what you might find out.