Keep an eye out for Corgan's wrestling league promo appearances too- I had him sign a few Pumpkins items when he was really there to pimp his wrestling league (was in a good mood that day, so he didn't seem to mind and others were doing same).
I’ve never been to his NWA events so I can’t speak on that. But as far as getting his autograph on tour, there’s not much of a chance. I’ve met him a few times before shows and he turned down multiple people. I already knew not to ask. He was very friendly though.