Hi Benno,
Yes, you need to be under the orange or red area to see aurora, and in my experience at a dark site.
Folks were reporting aurora as far north as Hastings on the North Island last night, but that's pretty rare. Down here in Christchurch we probably would have had a good show if it wasn't for the wall to wall cloud and rain.
The red arrow points to the noon meridian, i.e. wherever it's midday on the map.
This site has a little more data than spaceweather:
http://www.swpc.noaa.gov/pmap/
and the following page will give you some guidance on the required KP for your location.
http://www.swpc.noaa.gov/Aurora/index.html
AFAIK you'll generally need a KP of 7 to 9 in NZ to see aurora, depending on how far south you are.
Where are you heading?
Malc