Ed, Ozzies don't really daily drive their old cars. Most people have them on cheaper club registration, which is very restrictive. Cold and wet ... yeah that happens down south in Winter. Most people want to be in QLD for Winter. 55 degrees down there this week, 81 up here.
Is Anna gunna be joining you? The Barossa Valley is nice if you're into wines, which we're not.
Really hope you enjoy your trip to God's own country.