We have stayed in a static caravan on the site on a couple of occasions when our son was 8/9.
It was excellent for him as entrance to on-site water park was included in the cost of hiring the static, we had a great time but be aware that some activities in the park have to be paid for as extras e.g. Crazy golf.
it is only a short walk from the park to the nearby town with cafés , shops etc.
If you have cycles there are loads of cycle routes to various places including the beach which is excellent, although remember it does face onto the North Sea.
Hope this helps