Brandon,
I had a call from Brock Arifovic tonight (just before hitting the Pubs in Cairns!) and they DID come across one, hence the mayhem they had early in the trip.
They ran across a school of, his words, 'around 500' with the GT's ranging from 15-30+ kg....geez I'm stoked they got to see one!!
A W E S O M E !!!!!!!!!!!!!
Aaron.