Years ago, a gentleman from the forum, lived in his motor home at The River Bend RV Park, on the Umpqua River, in Winston Oregon. I remember him saying some fishermen/women had some good luck catching steelhead in the area.
...I would suggest for you to find some good holes in the Umpqua. Do some exploring is best.
https://www.google.com/maps/uv?hl=en...gMbT1N773RqrJF
At the Oregon Fishing Forum & ifish you can read about many stories of folks catching steelhead & a few maybe about catching Striped Bass. You can ask some ?? on these forums about where you can try to get lucky fishing for these beauties. (general area, anyway)
https://www.oregonfishingforum.com/
https://www.ifish.net/board/index.php
In the past i read some stories about catching Striped Bass in the areas around the mouth of the Umpqua River or the Smith River close to Crescent City. Folks might be tight lipped in recent years. I haven't heard of stripers being caught recently.
Years ago i caught some stripers surf fishing less frequented beaches in CA. & a lot of Surf Perch. (good eating)
I caught & usually released some nice sized stripers at:
San Luis O'Neill Forebay. (Soquel fisherman caught one striper that was 66lb+ in 1989)
California Aqueduct- I caught many nice stripers & catfish.
Delta/Mendota canal- caught stripers & catfish.
San Joaquin River- caught some nice stripers.
CA Delta-some nice stripers & catfish.
Sacramento River-caught stripers & catfish.
etc. etc. etc.
Best of Luck to you, alikair...