It is dangerous country at this time of the year. Although it's the heat and lack of water that's the problem not the snakes and goats and foxes. The roads in the park are sandy and unmade. Driving from South Australia to Mildura in Victoria you would turn north from Horsham or Ouyen and go past the Murray-Sunset wilderness area on a main highway. Not many towns but not wilderness. You could turn west into the park instead of keeping straight ahead if you believed Apple.
It is a dangerous mistake, I believe.
Cheers, Joy