Ready for a Long Flight

I believe we are mentally prepared for a 13 hour flight to Auckalnd, New Zealand.  How we will fare physically is another story.  We are departing San Francisco at 7:30 p.m. on January 27th, 2013.  When we arrive in Auckland, it will be January 29th at 5:30 a.m.  We will lose a day crossing the International Date Line.  The ship has arranged for us to be picked up at the airport.  We have no idea where we will be taken from there as I'm sure it will be a bit early to board the ship.  Whatever we do, I'm sure it will be lovely.  We will stay in Auckland, aboard the ship, for two days.