Book a campervan rental in Auckland and head north following the Twin Coast Discovery Highway. Take a detour along the Whangaparaoa Peninsula north of Auckland, before travelling further north over the Brynderwyn Hills to Whangarei. Cross to the West Coast and over the Hokianga Harbour to Kaitaia, Ahipara and then Cape Reinga at the very top of New Zealand. Return via the lovely island-studded East Coast.