I paid just the 32 AUS dollars entry fee and had a great time. The crocs are amazing to look at and make sure you watch them at feeding time (big crocs and baby ones). Lots of other interesting creatures to look at...fish, snakes, turtles and other lizards.
The talks are informative, especially snake feeding time and a chance to hold a non-venomous snake. The staff there were friendly and informative.
Food at the café/restaurant was fine.
Great 3-4 hours there !