The Department of Conservation - or just DOC - is a government agency that is taking care of and conserving New Zealand’s natural and historic heritage. They run & manage more than 200 campsites throughout New Zealand and these are often located in amazing & remote locations.
They also run the DOC Campsite Pass which is like a subscription / prepayment of heaps of DOC campsites throughout New Zealand.
For overseas travellers, you can compare DOC with these similar institutions in your country.
🇩🇪 🇦🇹 🇨🇭 .Ministerium für Naturschutz
🇳🇱 🇧🇪 Staatsbosbeheer
🇫🇷 🇨🇭 🇧🇪 Département de la conservation