In my generation Shimer was a total druggie school -- and "sexual experimentation" was way ahead of the curve. That was 30+ years ago.
My wildly unconventional niece has been very happy at COA -- again, I gather it works well for self-motivated students who hate bureaucracy and heirarchy.
The 3 OR and WA schools mentioned have done well by various children of friends. Although Monica did come out of L&C, as I recall ... it has a great location, close to downtown Portland, which is a great town.
Good luck. This environment will be so signifigant to the rest of your daughter's life.