This past year I have spent a fair amount of time researching subjects at Willamette University and Willamette Heritage Center. At the university their collections are very good for the local area and politics. Their Chemawa records are beyond most other archives in the area, especially their yearbook collection and photographs. I have contributed to the collection in a significant way and the availability of the collection to researchers is invaluable.
Then, the Marion County Historical Society archives, a part of the Willamette Heritage Center, along with the Mission Mill, has good collections as well. Their mostly volunteer staff is excellent. One volunteer, Susan Masse is truly excellent. I have gone to her on several occasions and found volumes of information with her guidance. Then, she would follow up with more information should she encounter anything on her own. The archives are in need of more digitization and are seeking movement in that direction at this time. But their services, and access to research aids are extremely good. I recommend stopping in if you are seeking information about people or subjects from Marion County.