There was a Ventura rotting at the end of Gove until fairly recently - it is now at Caloundra Air Museum.
I don't think there is a Hudson on Horn Island. All I remember is a buggered USAAF P-47 Thunderbolt in BAD shape, and I think the remnants of a Boomerang.
One Hudson now flies with Temora Air Museum, and the other I THINK is still in Melbourne (the one Searle USED to fly)