The way I remember it:
^^^

There's a trade you all know well
It brought these wild geese over
On the Northen Track and the Great Outback
They know the Queensland Rovers.

CH: So pass the billy 'round boys,
Don't let the pint just stand there
For tonight we'll drink the health
Of every Overlander.

There's men from every land
From Spain and France and Flanders
They're a well-mixed pack, both white and black,
The Queensland Overlanders.

CH

Out on the Northern Plains
Where the girls and grass are scanty
The creeks run dry or they're ten feet high
And there's either drought or plenty.

CH

When we've earned a spree in town
We'll live like pigs in clover
And the whole damned check comes down the neck
Of many a Queensland Rover.

CH

As I pass along the road
The children raise my dander
Crying "Mother dear, take in the clothes!
Here comes an Overlander."

CH

There are lyrics here, here, and here (with chords) -- and they're all slightly different.

Gordon Bok's is on his "Song for November" album.