This is another solid spot directly off Highway 101 that is managed By Washington DNR and only requires a Discovery Pass ($30 annually) to stay at! Set pretty close to Highway 101 a mile or so south of the turnoff to the Hoh Rainforest this is a much better bet than actually staying at the campground within the rainforest. If you're lucky you can snag one of the few spots right along the slow, cold and deep Hoh River and have a perfect view from your tent or trailer. Other spots are higher and away from the river but still settled in the trees of the campground. 

I only saw one vault toilet there but there is a second section of the campground I didn't look at that may also have a toilet. There's a self-registration station at the entrance and a handicapped-accessible spot. I wouldn't take giant RV's down to this campground but it can accommodate smaller pull-behind trailers. 

This is really an amazing spot and I'm sure it fills up during the summer. Beware though that this basically free camping can draw some sketchy people and if there isn't a camp host around I wouldn't leave any valuables out of your car(Iknow from experience) but most campgrounds do have host in the summer months.