Most tourists come to New Zealand to hike the countryside or to fish or ski. New Zealand is compact. Rent a camping van and drive the North Island and the South Island.
Campgrounds are friendly, reasonably priced and clean.
Most have hot showers, group cooking facilities, laundry rooms, fish-cleaning areas, playgrounds and other amenities. In Rotorua, look for spring-fed hot tubs. The refrigerator in the van may have an empty milk bottle. You turn this one in when you buy milk so that you don't have to pay a deposit on the bottle. Cities are a lively blend of old and new.