Green Peter Reservoir, is much closer. It's just few miles past Sweet Home. And, there are lots of of kokes in there (and trout).
Again, flat lining (without weight) about 100 yds. behind your boat is a great technique right now (early season). And for the kokes or trout, use a Ford Fender (or Doc Shelton) flasher set, with 18" - 24" of leader. Then tie on a wedding ring spinner and put a half of a worm and two kernels of white corn on the tip of the hook.
And, for kokes it is CRITICAL to tie a "snubber" inline. Kokes have very soft mouths. Without a snubber, you'll just the rip the hook out of their mouths when you set the hook. I add a snubber right behind the flasher set (at the top end of your leader).
I use a levelwind reel, and just count the spool rotations as the line goes out. Try 20 - 30 rotations first. If that depth doesn't produce, let it out to 40 and try that depth.
One more thing...a red and hot pink wedding works very well for either specie. But, if you want to nail trout...try a 1/2 green and 1/2 black wedding ring. WHAM! Fish on!!!