Super convenient to camp inside the park boundary to avoid all of the car traffic in and out of the park. The campground is a few minutes walk to all of the trailheads. Campsites are reservable at the visitors center (campground desk hours in intervals of 10am-6pm). We drove in around 4pm on a Saturday with hopes of getting a site and we got pretty lucky because some people cancelled reservations due to rain the next day…in a rainforest lol. I would 100% stay here again. Easy access to clean water, clean flushable toilets and beautiful old growth trees on the campground and some in the A loop back up to the hoh river.