last winter a mate and I tstarted to walk in to bush stream . started at 4.30pm . Which is way too late. pretty rough walk in. typical NZ stuff. we slept on the way in. Next day my mate got his boots wet. Walked straight out .
I'd fly in if I was going again. Try and get an agl back flight. Also call them up and ask about conditions because that's where they take people ice climbing
Call adventure consultants for conditions at wye because that's where they take clients.
I'd just fly into wye with heaps of warm stuff and nice food and stay there for as long as possible . U will get the most climbing done that way. Then walk out with your rubbish or send it with a guided group on a chopper . The walk out is easy and only takes a few hours if u don't get lost which might happen if u didn't walk in.