VFR
Having been fortunate enough to have done my schooling at Riverview and flown EMS in Sydney, I believe that I am qualified to give some pointers.
Firstly, do not go bushwalking with any Joeys boys! They will try and sabotage any Riverview guys (especially if they play in the 1st XV) so they can win the GPS football cup.
Secondly, as mentioned previously, the bush fire threat isn't there at present so tell Mrs VFR not to worry. Not for long though.
Thirdly, provide your son with a personal EPIRB. Such a tiny piece of equipment can help out in a huge way. Make sure you show him how to use it properly. Also, tell someone where thay are going, take a mobile phone (any problems - ring 000 - the authorities will take it from there), drop bread crumbs, etc.
Hope he has a ball.