Arataki CSC is listed as a campground at 300 Scenic Dr, Auckland City, with a Google rating of 5.0.
A good campground keeps the basics in order: a level, well-drained place to stay, clean toilets, safe drinking water and clear rules about noise, fires and dogs. Before you go, check whether you need to book, what the check-in and check-out times are, and whether the site has power and showers. Camps near bush and ranges can be cooler, wetter and darker than the city, so pack warm layers, a good tarp, a torch and insect repellent. Regulars check the weather and track conditions before they set out, arrive in daylight to pick a sheltered spot, and take all their rubbish home. The abbreviation CSC is not self-explanatory, so ask the site what it offers and who it is for.
For anyone camping near west Auckland, Arataki CSC on Scenic Drive is worth contacting first to confirm the details.