There's a sign that says no overnight parking.
You should be able to spend the night. See https://www.boondockersbible.com/knowledgebase/oregon-rest-area-rules/#:~:text=You%20are%20permitted%20to%20sleep,cannot%20stay%20beyond%2012%20hours.
I'm not sure but I know big trucks are there so I'm sure if you have to get a few hours shut eye.
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