Vibe, Location, Serenity
This is a solid spot, fun to find and a great mix of smallish-medium campground size, tall mix of trees, nice area full of near-legendary trails and two nearby campgrounds (Cold Creek and Sunset) that you can go to if Rock Creek is full. I would get here on a Friday night, hike the nearby Tarbell (right from this campsite), Yacolt Burn or Bells Mountain trails to your hearts content Saturday, and relax Saturday night into Sunday. Or jump on the Trillium Mountain Bike trail. This place is a little harder to find because a lot of the Forest Service road signs get vandalized and taken down, but even I found it (through copious trail signs like the one pictured).
Month of VisitMay