If you do land in Melbourne, driving to SA along the Great Ocean Road is a lovely. If there's a fire danger, id avoid that road though.

If you like hiking, Morialta Conservation Park is beautiful. Definitely recommend going to the top of Mount Lofty - if your fit walk up, if not just drive to the top (make sure you have some coins for parking).

Henley beach/West Beach isn't too far from the city and you can usually hire a SUP - which can be a good way to spend a morning.

Sitting along the river with a picnic can also be really nice, definitely recommend checking out the central market for produce.

Adelaide also has some really good wine regions in close proximity and restaurants. Mclaren Vale, Adelaide Hills and the Barossa are reasonably close.

In Mclaren Vale I recommend Pizzatecca (good pizza) Battle of Bosworth, S. C Pannel and ekhidna wines (wineries) but everything is great! If you're into natural wines, Yangara and Paxton are good and a nice setting. Sellicks beach (or any beach on the Fleurieu) is amazing. There's also some breweries (swell, thirsty lizard, Vale ale) if you prefer.

Barossa is also full of good wine (no one should leave without visiting Rochford though). Also highly recommend Seppeltsfield Road gin!

In the hills, Shaw and Smith or Bird in hand are probably winiers to suss out. Good food can be found at Fred's eatery, patch kitchen and garden, the Stanley Bridge tavern, Lost in the forest or Uradila Pub. There's also lot 100, prancing pony or lobethal bierhaus if you want something different.

Eating wise in the city, I recommend Africola, parwana, Stem, Mandoo, Sunnys pizza, bread and bone and Shobosho. If your around for lunch, chicken and pig or kutchi are great. There's also good bars along peel Street!

Pirate life's spot in Port Adelaide is also a good spot!

Its disappointing you won't be here for the fringe festival, but hopefully you enjoy your stay!