LOL Just realized that, you mentioned Veneta. Fern Ridge is full of slabs. And further west (and north a bit), is Triangle Lake.
Also the Long Tom River, below the dam (above the dame, is a trout fishery).
There's also Cottage Grove, and Dorena, Reservoirs just a bit south of Eugene. To the west, and up in the Cascade foothills, is Hills Creek Reservoir. For years, I've read about white crappie in there.
Then, there is the Willy. With lots of tribs, and miles of sloughs to explore. If you want to venture north, there's great water at Minto Brown Park...just SW of downtown Salem.
And a lot more of the Willy, to explore. Including an old rock quarry pond, on the south side of Hwy. 34, just coming out of Corvallis (directly south of Trysting Tree Golf Course). Just don't eat any of, those pond fish. I tubed across that lake, as a kid. Then my cousin, and I, began to see fish floating belly up. Then we noticed a layer refuse landfill, along the SW side of the pond! But that was nearly 40 years ago--so maybe you'll find some with threes eyes by now?
Those places, should keep you pretty busy for while. Good luck.