We went over Labor Day weekend with a small group and had two adjacent campsites. The sites were large and well graded. They were also well separated from each other with lots of vegetation dividing them. Bathrooms seemed to have been recently upgraded and were some of the nicer state park bathrooms we’ve come across. Kids enjoyed the junior ranger program and the Mt St Helens visitor center across the road has great exhibits on the eruption. About a 40 minute drive to Coldwater lake where you can access a number of trails closer to the volcano.