We enjoyed swimming in Three Sisters. My advice is to watch the videos at home and sign the forms at home so you don't have to wait at the shop. Get there as early as you can. The parking at the launch park is limited. The later you get there the further away you will park. Oh, and drive to the park yourself. Go straight to Three Sisters first as it will get really crowded quickly. Then follow the route on the map provided to the other springs.