Visiting New Zealand, especially the South Island, is like visiting Alaska, Scotland, Colorado, California, Yellowstone, Finland, Tuscany, Arizona, and Death Valley in a few weeks time. You will encounter glaciers, deserts, temperate rain forests, vineyards, mountains, fjords, beaches, ski slopes, etc. In other words, take a shipload of film and cover your bases. You will shoot in bright sunlight, deep forests and everything in between. I don't think you will be best served by a "one film for all purposes" approach.