A Northwest Pass is not required at any of the climbing areas in Western Oregon. Camping is free on National Forest and BLM Lands, except in improved Campgrounds (campgrounds with parking areas, tent space, and outhouse). Check on fire restrictions before building campfires, but usually camp stoves are OK.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe