With your particular dinner reservations, I think you might consider a rental car. We have stayed at the AKL, and the bus service was fine. But, like you, many of our dinner reservations were on the other end of "the world", and we used the car in the evening. If you have plenty of time the bus connections are fine, but for the small cost of a rental car, it gives you a lot more flexibility.
We always get a rental, and in some resorts, we leave it parked all week. But at AKL we did use it. (Nothing against AKL--we love it).