by matthias » Wed 24 Nov, 2010 11:48 pm
Gas cans and other 'last minute camping gear' can also be purchased at the Cradle Mountain visitor centre where you collect your pass before you start the walk. At least they did in 2008 when I was there. Maybe you could just call the visitor centre there and they might be able to put a gas can aside for you.
Only catch is that it's a bit more expensive compared to buying in a hiking gear store.
Edit: another option: if you spend the night at the Arthouse hostel in Launceston, they sell/hire hiking gear at the reception and I'm sure they could organise something for you if you tell them with your booking. Very friendly people there.