Look out for the the Department of Conservation (DoC) campsites which provide a variety of sites in many conservation areas throughout New Zealand and which are much cheaper than private campsites. There are six categories of DoC campsites:-
Serviced campsites – include a wide range of amenities with flush toilets, kitchen/cooking facilities, hot showers and rubbish collection. These campsites can be booked at a DoC visitor centre.
Scenic campsites – Usually in high-use, coastal locations, these campsites have toilets and tap water supply and often barbeques, cold showers and rubbish bins. Some scenic campsites can be booked in advance.
Standard campsites – Limited range of amenities including a pit or composting toilet, a water supply and some may have cold showers, barbeque and rubbish facilities. These campsites generally cannot be booked.
Basic campsites – You really need to be self-sufficient to stay at these campsites with basic toilet facilities and water from a tank, lake or stream. Basic campsites generally cannot be booked.
Backcountry campsites – Usually have toilets and a water supply from a stream. They may also have basic cooking facilities and picnic tables. These campsites generally cannot be booked.
Great Walk campsites – There are 60 Great Walk campsites situated along all Great Walk tracks (except Milford) and they offer basic facilities including toilets and a water supply. Bookings are usually required and can be completed online.