Good Doctor, if you are driving down the North Island to Wellington, a suggestion of places to stop for a rest, Waiouru army museum, located on the Desert Road, just look for the volcanoes in the centre of the island, yep, one of them is still active and has a wee tantrum every now and then. You also shouldn't go past Southwards Car Museum at Paraparaumu, very cool collection of old cars, or head inland to Masterton and go to Hood Aerodrome, home of The Vintage Aviator collection of Great War aircraft, although some of them are away in the UK and Australia at the moment, but still the largest collection of flying Great War aircraft in the world. Once in Wellington, go to Te Papa, the national museum, which has an exhibition on Gallipoli and the Great War prepared by Peter Jackson's Weta Workshop, also there's an exhibition on 75 years of Air New Zealand, hostie uniforms and stuff.
A few things to whet your appetite...