Stayed for a couple of days; weekend into weekday. It was a 50% reduction in people from weekend (full) to weekdays.

Super easy access to the causeway: took us 50 mins to get to the WWII museum and 15 mins to a Whole Foods. Sites are well spaced apart and easy to get into. Between their website and Google Maps, it's really easy to pick a site you'd prefer.

Campground is perfectly located in the park, near the beach and trails, but not too close to worry about day traffic.