Campsites are more open then we normally like but it is a good place for families. The beach is great, but it is a little bit of a hike with all of your gear.
There are only a handful of tent only sites, most of which are secluded by trees. We have gone twice and enjoyed it. The group site is large and open. Beach access is very easy, especially with kids. The beach is wide, flat and great for families. The first Saturday of the month the rangers do a tide pool talk. They bring sea creatures (like sea stars, sea slugs etc) to share and let the kids hold them.
One thing to be prepared for is the wind. The tent sites are VERY windy, especially at night.