|File photo taken by Jamie C ©|
The aircraft planned to arrive from Undara (near Cairns) and Ingham included Gold Coast-based Cessna 210-5 VH-RYB and Cessna 182 VH-MST, along with Flight One (Services) Cessna 172 VH-AFR and Darling Downs Aero Club Cessna 172 VH-TWB.
Of interest, the photo of VH-RYB above is from March this year - perhaps when it was heading North to Hamilton Island from the Gold Coast.
I also note that around this-time-last-year. a similar group of aircraft were also noted flying South from Hamilton Island.