I won't make Friday unfortunately - but a good trip would be:

Start at Ohau (Poads Rd), head up the Ohau river (south branch) and up to Te Matawai Hut Friday afternooon/evening. Then up to Pukematawai, Arete, Dundas and down Triangle Spur to the Mangahao (old track from the bushline). Then its a short walk down to Mangahao flats hut.

Everyone else is coming in from the Mangahao dams, but am sure some people (me for instance) could be keen to walk out a different way on Sunday and get picked up/do car swap.

Not sure what the snows like but might want an ice axe? There was quite a bit in the ruahines on the weekend apparently...