Sorry for the OT

But since u are in NZ and in South Island...just wanted to Say that DON"T miss out the adventure sports in QueensTown...I did the hightest Bungy Jump (452ft..costed some 200$, and other bungy jumps, canyon swing, sky diving)...doing these adventure sports in NZ is different in itself...
I took a week off to explore south Island ...hired a car from christchurch and went around to queens town (& milford sound), fox glacier, picton.
Also covered the top 10 scenic drive which comes after westport (which was a disappontment)...
U gotta drive from fox glacier to westport amd queenstown to westport...these 2 drives are out of the world
I still remember...I had spend around 9000$ in a week among 3 guys

(car, tickets, adventure sports, etc)... stayed in youth hostels and kept the car for 5 days...
took the ferry from picton to Wellington (Its a must and is said to be one of the best scenic rides...again

)