This is a great family campground.

We (2-adults) spent two nights: Sun & Mon. The campground is huge but our site felt fairly private even though there were lots of campers around. Good, clean services (toilet, water, trash bins); it's very well maintained. 

We explored the area near Mt. St. Helens during the day; there are plenty of lakes and hikes around. 

For what it is it's great. If you are looking for more remote and fewer campers, it may not be your first choice but for an easy getaway between Portland and Seattle, we enjoyed our time.