Boofhead,
As a fellow Brisbanite, welcome!
First, Treasury BJ sucks proverbial donkey dick.
The main floor is all CSM. Shoe games are high roller room only.
As for basic strategy, the rules at the Treasury are:
6Deck CSM, S17, D9-11, SplitOnce, OBO if Dealer BJ's. House Edge = 0.55%
Because its Original Bets Only if the dealer BJ's, the game is mathematically equivalent to the dealer peeking for blackjack. So check 'dealer peeks.'