Brisbane to Sydney
 

Hi All
After some suggestions for beginning of october, my family and I are travelling from Brisbane, leave tuesday AM to arrive Sydney midday sunday. Soooooo many places and things to see and do having great difficulty in narrowng it down. Quite fancied seeing Byron Bay,Coffs harbour ?Blue mountains. I know 5 days is not very long but any other suggestions would be most appreciated.
is there anywhere thats an absolute must to go, we like beaches, wildlife and heritage things
Have a 20 yr old and 10 yr old to keep happy as well us
HELP

JILL & family
hopefully Adelaide 2004:D :D :D :D