For those of you visiting Adelaide, which is my home town, there is lots to see in South Australia. The Tour Down Under is held here in January then from the 17th February to the 19th March the Adelaide Fringe We went last year and saw a great show at The Garden of Unearthley Delights, street theatre at its best. Then there is the Adelaide Central Market, great place for fresh food and lots of places to eat for lunch. I think the other places worth seeing besides Adelaide's amazing beaches are Stirling, Aldgate, Hahndorf in the Adelaide Hills. You can drive through the Adelaide Hills to the Barossa Valley and the wineries or turn off towards the mid north, which has lovely little towns such as Clare and the Flinders Ranges. Also the Riverlands driving from the Adelaide Hills driving past Lobethal to Birdwood. Another lovely drive from the Adelaide Hills through Strathalbyn to Victor Harbor and Goolwa. Great places for whale watching during the winter months.
Qld has extreme muggy heat from around December through to February which is hard to take. I lived there for eight months during 2015 and the most amazing places to see are the Glasshouse Mountains and a visit Montville and Maleny is worthwhile. The views from Montville are absolutely breathtaking. I am also visiting my niece who lives near Gladstone during the middle of this year and will be taking my GSs, we are travelling on the Tilt train. I have been wanting to take this trip for awhile now. Train travel in Australia is cheaper than the UK.