I would talk to the local farmers in the area, or the local ELDERS farm supply or the like. They would know what's best for their area. You'd get tea and scones (with cream and jam) at the farmer's place too probably.
I would also not mention airport/airstrip/airfield or the like to a council either. Just don't.
Private airstrips on private farmland require no planning approval in Victoria. Refer to UPSON V CORANGAMITE VCAT 2267 3 NOV 2005 clause 17 as an example.