Planning a trip for next year. I have a Waiheke bach booked for a week. Is that too long to spend on one island? I was kind of thinking we would be able to hop over to Auckland to do stuff, but I see it will cost $113 (return) each time. The kids will be 7 and 9 by then. I'm content to sit on the deck and watch boats go by for at least a few days...then I might start getting bored.