Hi Ken,
+1 for Neale's suggestion, including places to stop.
When I was a kid, I grew up on the Gold Coast and we drove down to Melbourne for holidays each Christmas. We'd always go the inland route, stopping at Dubbo or Gilgandra overnight, and would go inland to Warwick rather than following the Coast roads in Qld. Was a reliable 2 day journey with two drivers.
Any chance a friend could go with her and fly back down? Hope she has a safe trip
Mich