You will never be too late for a season, people come and go just got to dig your toes in and wait your turn. Lots of small operators out there as well just talk to everyone and something will come up sooner or later.
I second Solo's comments. There seems to be a misconception that there is a 'season' in Darwin. While this may be true for Kununurra, in Darwin companies tend to hire all year round, or at least the ones that I worked for did. This often means there is an under supply of pilots during the wet.
On another note I know of a pilot getting a start recently with one of the larger companies in Darwin with minimum hours.
Full time job with minimum hours?
Things sure have changed since I was in Darwin!