Old thread I know but I have been there many times,the worlds largest colony of rousette fruit bats,dont do what I did and try and get a little way in the one entrance that's accessible when I first ever went before it was fenced off,i was covered in bat pee and poo.Try and get there as dusk is setting,cover yourself in deet for the mozzies,and you might just be lucky enough to see a python or two that hang around the entrances waiting for bats to fly within range.