It is everyone's responsibility to see and avoid, and fortunately in this case you did, so it worked! You can look as you overfly, look as you turn, and look behind you as far as you can see. (Otherwise when you become a fighter pilot you might get shot down!)
People talk about the added safety of CTAFs having mandatory radio requirements but is isn't true because anyone can make the mistake of being on the wrong frequency, or have the wrong radio selected if they are monitoring two frequencies, or even have a faulty radio and not know it. At some airports there are some non-radio equipped aircraft too, and that certainly used to be the case at Maitland when I flew from there.
Also check ERSA (the current one of course ;)) to see if there is an AFRU or UNICOM if you are flying somewhere. I don't think Maitland does unfortunately. But if there is an AFRU listed and you don't hear anything, or a UNICOM operator and you get no reply, check your radio (frequency, volume, selector panel) and try again. Also think about where you are going. Maitland often has traffic, so if you don't hear anything from 10 miles out it might make you wonder why. I think it is now on the Cessnock frequency (from memory) so between the two airports you'd expect to hear some calls. If you don't hear anything, start to wonder why!
Please use current documents!! If you haven't had a chance to order from Airservices or Bankstown, some of the Camden schools carry ERSAs so you could buy one before the flight, or even download and print out the pages from the Airservices website. If you can't do that, maybe even tell the school you don't have current documents and they might be able to lend you an ERSA or even photocopy pages for you.