Hi Adam! First off, congratulations on taking the first steps in your journey by coming to terms with this about yourself and seeking out community--that's a super important thing, I feel.
As for PTHC, its an amazingly diverse and welcoming get together, with folks from just about every place on the spectrum and at every point in their journeys. When I attended last year, I had only been out to my closest friends for a couple of months if that, and I like you was pre-everything regarding transition. I didnt even feel confint enough to wear a skirt to the conference until the second day (I myself am MtF). I had a great time and really enjoyed going. If you want, I'd love to get in touch prior to the event so we can meet up and hang out. I'm mostly involved in the Jewish programming there, but I'm also hoping to get some board gaming going in the big social room.
Cheers!
Leiah