Tony
North Island ▷ Auckland Region ▷ Pukekohe ▷
A bit hard to find as this app currently lists this site in two places (across from Z service station is not a camper park, it is only a dump station).
The Waiuku Service Centre freedom camp is located behind the service centre building, by the St John Ambulance building, opposite the toilets. Three parks are available, next to the parks for St John staff, max one night stay, vacate by 9am. We stayed on a Saturday night and had no issues. We were warned by the locals that the nearby fire brigade siren was tested at 7.30am on Sundays