It wasn't until a couple of years after, or maybe before, that, that I finally laid hands on Illuminatus!. Only book I ever stole from a library, if you want to call it "stealing" - it'd been there over a decade, never once checked out, and wasn't even in the electronic card catalog; I felt sorry for the poor thing, which seemed desperately lonely, and gave it a good home in place of a neglectful one. Still have it, in fact. Probably still have a copy of Principia, too, but if so, I don't know where in my shelves it is, which should tell you all you need to know about which comes first in my estimation.
(On reflection, I suspect I first found an electronic copy of Principia, rather lacking in illustration being the plain text file it was, then discovered the existence of Illuminatus! and found my copy, and finally sent off for a paper Principia which by that point was amusing but somewhat supernumerary. Do you really call yourself a Discordian in public? Why?)
L Ron Hubbard?
Church of all world still nominally exists, and has been through several incarnations during the 60s. Although its foundational premise was indeed deeply silly, it was self-consciously so: an act of intentional myth-making. It encouraged its members to explore other spiritual paths as well as to create their own; and there were many CAW members who were committed Buddhists, Jews, atheists, etc.; a large majority counted themselves as Discordians. The only principles held as official dogmas were things like "Nature is Good", and "Be Excellent to Each Other" (because why the fuck shouldn't Bill & Ted be part of your mythos?). So it was all in rather good fun.
This is not to say that the organization didn't have its problems. Chiefly, it was frequently subject to nasty internal politicking -- personality-driven power-plays of the sort that are unfortunately quite common in idealistically non-hierarchical organizations. But when measured against typical metrics for cults, eg[1], it fails on every single count.
Anyhow, just a gentle reminder that not every new religious movement is a cult (in the conventional modern pejorative sense of the word).
[edit: fixed link.]
("Nature is Good" strikes me as lacking nuance, though. I see what you're going for, but toothache is natural, too.)
Judging by his written works, Wilson seems like he would've been quite a man to know. I'd like to be able to say I'm not so small a person as to envy you that opportunity just a little, but honesty compels me otherwise. He was kind of a minor hero to me in my youth and early adulthood, seeing as Illuminatus! helped me gain the perspective to get through some very difficult times in my life; if nothing else, I'd have liked the chance to thank him for that.
And yep, Wilson was the real deal. His work had also been a huge influence on me at the time that I met him. I still evangelize Quantum Psychology to anyone who I think can handle it.