In reply to RuthW:
We had sh*te weather the while time, save for half day where we climbed rolling pin at the last day before walk out.
The hut was chilly, as it rained every day for three days solid, with high wind too. There were five of us, felt cold and damp, especially durring coking.
However, the summer bag sufficed, albeit with the body warmer used as an eiderdown inside the bag. Low weight will be useful for the walkout.
Now sitting in a wet wanaka waiting for ex tropical cyclone gita to hit town.
Hope you have better weather than I did !