Bioshelter Backpackers is a campground at Little Oneroa on Waiheke Island, with a Google rating of 4.9. Its name suggests budget backpacker-style stays.
Camping and backpacker-style stays on an island take a little more planning than on the mainland. Shops can be few and close early, so bring food, drinking water and a torch rather than counting on a late supply run. Check the ferry timetable and how you will get from the wharf to the site, as buses and taxis run less often than in the city. Ask before you arrive about toilets, showers, cooking space, fire rules and quiet hours, since facilities vary widely from place to place. Pack sturdy pegs and a windbreak if you plan to pitch a tent, and take your rubbish home if bins are limited. Regulars book early for summer and long weekends, and they leave the ground as they found it.
For visitors exploring Waiheke Island, Bioshelter Backpackers offers a place to stay at Little Oneroa.