I have a three season tent, an REI Dome T2. I realise it is not a winter tent but according to this US review it could be used in snow.
http://www.backpackinglight.com/cgi-bin ... Y-2hug_5Dv
I realise that the US review might not be applicable here as their snow has different characteristics than ours.
Last time I camped at Federation Hut in winter I hired a winter tent and it was very heavy and cramped as it was a one man tent to save weight.
If I can use my tent safely for just one night up there and perhaps for a few other nights of snow camping elsewher I would be happy.