Go up via Highway 17 to Biloela then either keep going to Capricorn highway then turn west or west at Bilo. Plenty of spots for an overnighter along the way. Turn off through the D'Aguila or Bells Bridge nth of Gympie or Biggenden from Maryborough. Bedford Weir just NW of Blackwater a great spot for a few days.
West to Nanango, north to Mundubbera or Cania Gorge on to Biloela and then Emerald, interesting trip have done it many times and always see something new.
Geoff and Bev