well if it were me.....(be prepared for a bunch of typing, if thought this out alot...)... I'm a christian so im going by what I believe. It says in revelations that after the rapture the dead will walk the earth (ergo, zombies). So, considering you did not get raptured, and the dead are hostile, I would be looking into an island. it is said zombies can't swim, so it seems like a good idea, bring enough food for... 2 weeks, and enough ammo for a month, odds are the island will be uninhabited, and has a supply of its own crop. oh yeah, bring stuff for planting food. now as for transportation, just hijack one of those tornado trucks that can hunker down in a tornado, that should be plenty of protection. and for a boat, whatever is big enough for what you need. now, after 3 weeks, scope out what is going on in the mainland. zombies run out of brain...they gotta starve eventually. when the zombies starve out, make your way back to land, pick up stragglers, find the nearest functioning civilization. presto.
also, if you live in new zealand, you got nothing to worry about.