That sounds really nice. We're just trying to decide whether a driving trip or a drop by the beach/pool trip would be better for the little one. We have opposite opinions on that at the moment!I think I said earlier we just did the south. So Hobart, Huonville, Geeveston, Cockle Creek, stayed a night on Bruny Island then back around the other way to Port Arthur which is also near the Tassie Devil sanctuary. Port Arthur was fantastic. Stayed in the hotel there that overlooks the grounds. Really beautiful place. Hard to believe it was ever a prison. Can't really comment on the rest of the island as have sadly never made it back there.
I guess it depends what you want to do though. The above is good if you like communing with nature and the landscape and things in it.