my husband and I will be in Aukland next year in June for 5 nghts and 4 days. Wondering how to make the best use of our time. Is it best to stay in one place and take day trips or to travel around the island? Can you recommend any hostels or budget hotels. Do you need a VISA? we are US citizens. Is it better to rent a car or go with a tour or taxi for the day? Do you need an international driver's license?