Agree with post 3. In the larger cities it will cost $$ to park the thing. Unless you plan to spend most of the time away from cities/towns.

Note freedom camping is severely restricted in many/most popular tourist places. You get "encouraged" to stay overnight in caravan/holiday parks, for a fee. Some places have designated freedom camping areas, but often get full in the mornings.
https://www.jucy.co.nz/useful-stuff/freedom-camping/
https://www.britz.com/nz/en/get-insp...ng-new-zealand
https://www.christchurchnz.com/getti...erbury-region/