Had a great time camping over the weekend at Mill Creek Campground in the Redwoods. We stayed on site 43, which has fantastic seclusion.
I'd suggest 39, 41, and 42 - in that order - for future use. 39 has perfect creek access and sun, while 41 is less sunny, but has great access. 42 is a one-day only site. 43 is great, too but had no creek access.