Not exactly sure what you're asking, Iggy.
You can C&R sturgeon anywhere on the Columbia, from my understanding, bank or boat.
You can C&R sturgeon on the Willamette, from the RR bridge (Lake O-Milwaukee) to the mouth, and anywhere above the Falls (you can keep them above the Falls).
Multnomah Channel and the Gilbert River is considered part of the Lower Willamette. You can C&R there, too.