Hi Fraser
You should also have a think about what types of walks you want to do. Most clubs have a sample program on their web site. For example:
- CMW is definitely focussed on overnight walks, walks are at the harder end of the spectrum
- SBW is focussed on overnight walks, but usually has a day walk on each day of the weekend; walks are again at the harder end of the spectrum - many have an off track component
- Bush Club has walks on pretty much every day of the week, and the walks are generally easier, mostly day walks with the occasional overnight walk
- NPA also has walks most days, similar style to the Bush Club - mostly day walks, at the easier end of the spectrum
Unless you're just trying to make friends, there's not much point joining a club if it doesn't do the sort of walks you want to do.
The ones above are probably the four biggest clubs in Sydney. It may also be worth looking at the suburban clubs - there is a list on the Confederation of Bushwalking Clubs web site -
http://www.bushwalking.org.au/clubs.htmlSBW has around 250-300 members under 40, though quite a few of those are prospectives ie not full members yet. Bush Club has a slightly older demographic, but that's during the week, as lots of retirees walk then. From the few weekend walks I've done, I think the weekend demograpics is a bit younger. I don't know much about the NPA as I've hardly done any walking with them. If you're looking to learn as well as make friends, a good range of ages is ideal. As climberman says, you can learn a lot from older members.
Disclaimer: I'm a member of SBW, Bush Club and NPA, and I'm over 30 and under 40