I'm frequently asked where I go to learn what I do.
[As an aside, I believe based on reading that "Where do you learn how to do that?" has replaced "How did you do that?" as the most popular question audiences ask. This seems to be a recent shift, and I think it's due to the influence that Harry Potter, or more importantly Hogwarts School of Witchcraft and Wizardry, has had in popular culture. My audiences can now imagine a magic school, even though there really aren't such schools in real life.]
The truth about us is that we're not terribly secretive people. Magicians are horrible at keeping secrets. The reason has primarily to do with vanity: If you come up with a truly interesting idea, you want credit for it which leads to the idea being promoted in one form or another. So in actual fact the "secrets" of magic are being disseminated all the time, just slightly off the side of the road where you don't notice.
In a typical year, I add twenty to fifty books and a similar number of periodicals about magic to my library. By and large, these books aren't especially hard to procure. In the magic world, my money is just as green as yours — fabulously rainbow-coloured in Canada. But educational resources, and gatherings like this are easily accessible if you know where to look for them.
As Fox Mulder was famous for saying; The Truth Is Out There.