As Whowasthatberntpersson has indicated, the Gold Coast Labrador track is a comfortable 1 hour's drive from Brisbane. It's a 4 lane freeway each direction which makes for a very easy, "no hassles" drive.
However, if you're staying in Brisbane I'd be happy to give you a lift down and back. It should be a good meeting including Junior U16 solos during the late afternoon, followed by 20 Heats of solo action interspersed with sidecar racing. Labrador is a unique track which generally produces cracking racing.
Please let me know what you decide and if I can be of any help during your time in Brisbane.