heaps to do from here, like Rotorua and Taupo (only 1.5 hrs drive if you hire a car) but if you just want to wander locally, a must -do is the base walk around Mt Maunganui. If you are agile and fit you can do the summit where you will have beautiful views. We did the latter when we stayed around there pre-cruise and the base walk, we did from the ship. We are both 65+ and reasonably fit but you will still have sore calf muscles after the summit walk!!
driving over the hills to Christchurch was wonderful the scenery is just so exquisite. Seeing Christchurch city centre in ruins was really sad but we would want to go back and see it a yr later as progress is happening v slowly. The container mall was worth seeing - a little joy amidst the sadness