Sites good for kids 13/15

Manfried

hi all

im starting to think about next season and wanted to ask for recommendations for a family with young teenagers. 

Being recent converts from tent to van I'm looking for suitable options

We don't normally go for large holiday park type sites but last hear had a week at longleat which was nice

can you suggest anything similar which is good for kids as I don't want to book anywhere that is too quiet and remote. 

Thanks all