We visited mid June, holiday weekend but still not too busy.
This is an excellent campsite. Kids loved the bouncy castle type play area, outdoor, indoor and waterpark pools. Bike hire on site, good value cabins and ready pitched, all mod cons tents.
Guys,Make sure you bring your budgie smuglers for the pools!
Super location for access to bike path and not too far from the lake. Fresh bread available from bar and good food at the restaurant although service can be slow.