I am the Information Officer and also the Program Organiser for the club, and I usually respond to these sorts of queries through the main VSA email address (enquiries AT vicspeleo.org.au). I’d be happy to help! We do have some good caving in Buchan.
I’ve got your email address and will send you some information by regular email. PS – I also live in Canberra, which may be handy for you in setting up Buchan trips!