The eastern rocky shoreline, of Dorena Res., has a nice population of smallies.
Also, the southern shoreline of Fern Ridge Res. should be good right now. And don't overlook the Long Tom River, below Fern Ridge (and all of the way to Corvallis). There's a lot of private land, but many folks will let you fish if you stop and ask permission first. There's largies and smallies in there.