Hey Axle, have a great time on those windy (not windy, wine-dee) roads.
Make sure you do the run up Mt Wellington, if its open.... its quite a ride!
There was a little snow on top when we went up there a couple of years back...
Must sees that I remember... everywhere!
Freycinet is lovely, Port Arthur is a must, Cradle Mountain (unless it gets snowed in, like we had, although that was fun too).
The run down the side of the Tamar river (the roads that run next to the river, rather than the main highway).
The A3 - the road that winds up the through the mountains from the NE coast back toward Launceston.
If you're interested, there are some pics from our trip here
to wet your appetite
Be ready for all 4 seasons! Take spare gloves and plenty of good wet gear.