We drove into the campground on a Friday night and were surprised to see that the 5.5mi dirt road was on the side of the mountain and had a lot of ruts. We were driving a Prius Prime with low ground clearance, so it took us nearly an hour to get down to the campground from Hwy 120. Others driving a truck and a Chevy Suburban passed us pretty quickly during turnouts.
Though 4WD or higher ground clearance is not required, I would recommend it! Otherwise, be prepared for a slow drive down to the campground.
Campsites are free, and the facilities are pretty bare bones (you have a picnic table, a fire pit, and a bear box at each site plus a single toilet at the campground entrance), but we got excellent views of the stars and were the only group at the campground. I definitely recommend this campground if you're looking to get away from everything and everyone.
Other than the unexpectedly difficult drive down (for a sedan/Prius), we all enjoyed this campground. We will be returning in a more appropriate vehicle in the future.