Camping trailer at Heart O' the Hills campground near Port Angeles. NPS Photo. Group campers in Sol Duc Campground. NPS Photo. Reservations: Kalaloch, Sol Duc, and Mora (new for summer 2020) are the only campgrounds that accept reservations in the summer. All other campgrounds are first-come, first-served. Payment is by cash or check only. Many campgrounds are self-registration and change for over payment cannot be made.