Hi The sites are cleaned evry day so others can use the area. Recall we have about 200 new hikers a day.
Storage lockers are in the overflow lot also so seems like the night before most everything would be in the locker, KEEP IN MIND never leave a pack out , So when you pack your tent/ "stuff" head to the trail head, place your extra items in the car then get your pack and remove your food from the bear locker all in the flow of the layout of the new campground .
Another bonus of the walk in sites your car is at the trailhead no looking for parking 1/2mile down the road! As everyone leaves the trailhead parking clears. Unless you arrive at 2 AM those spots are taken , but arriving say 3-8 PM the DAY HIKERS /OVERNIGHT HIKERS ARE LEAVING and you can park very close to the trail head sites. Thanks Doug