Great spot, but noisy
If you don't mind trading absolute silence for an absolutely great camp spot, then this might work for you. A lakeside site will cost you $20 and lumber truck traffic noise from the busy 101 less than 1000 feet away.
Revision: We actually left this site after spending a few hours here...It was way too noisy and the sites were way too exposed to feel private...Awkward eye contact, anyone?