Its worth reflecting on the airports in Melbourne basin in the 70's that are now gone, really only leaving Tyabb & Tooradin.
Between Petropavlovsk post & my memory others were:
Casey Airfield - Berwick. (Now Federation Uni)
Moodooduc airport (Jack Ellis)
Pakenham (Commando skydivers)
Labertouche. (Skydiving)
Berwick (Boundary Rd ) Barry Coutts
Mercedes Park (Cardiniya RD South of Pakenham) - now helicopters?
Colonel Edward 'Ted' Neil had a private airfield just south of Berwick
Rusty French had/has an airstrip west of Cranbourne
John Berends had an airstrip between East link and the Frankston - Dandenong Rd
Another one near the intersection of Springvale Rd & Peninsula link.
Philip Island (now helicopter only)
One in the centre of the race circuit at Philip Is
One beside the Nepean Hwy near Hickinbotham wines.
Pretty much all gone to make way for houses.