Thanks everyone for your input, and thanks lizzy for your transport suggestions!
Ive got flights and bus all booked for november.
something really interesting which i just realised, is that the total cost for me to do this walk, is seemingly cheaper than for me to do the overland in Tassie. (comming from sydney). I know its better to try to keep the Aussie dollar in Australia, but when costs are so comparible in terms of flights and transport, NZ seems mightily attractive.... . sorry, maybe i shouldnt have said that on a bushwalk "tasmania" forum. but tassie is still the best place in Australia.
Its been years since ive been to NZ but from memory, they took all my beef jerky at the airport. I remember NZ having an equally strict quarantine regulation on par with australian standards. I just dont want to stock up and dehydrate all my food only for it to be confiscated at the airport.
did you guys have any problems getting food through the airport?