How to divide our time between north & South Island? We plan a trip of about 3-4 weeks, early Nov thru early Dec. Friends to visit in Kerikeri & Rotarua on south island. Would like some idea how to divide our time between islands. Air NZ tells us it is less costly to book our flights with our international ticket to NZ, but we would like flexility. Not up to driving long distances - thinking of 2 or 3 stops on South Island - how to choose. ChristChurch, Queenstown, Dunedin. Maybe take bus for some connections, flight for others, chosing bus when scenary is compelling.Are there local airlines that offer better fares than Air NZ? We are late 60's, but active - love sea kayaking, swim in the ocean every day at home. Thank you.