Nezaglomie:
Nice! The first GenCon I've been to (only one of two) was GenCon XII, back in 1979, when they were in Lake Geneva, WI. I had submitted to be an official GM of a scenario that I had written (just one 3-hour session). Consequently, I had a "Judge" badge instead of an "Attendee" badge, so I was able to bluff my way into the vendor area an hour before it opened. I started the line forming at the official TSR booth and I was the FIRST person to purchase the AD&D Dungeon Master's Guide. I still have it on my shelf.
I was 4 years old back then. Mind you my first GENCON was in 1997 in Milwaukee as a gift to me from my gaming friends when I got back home for surviving my enlistment in the Active Duty Army. (And surviving almost invading a nation (Haiti in 1994), and spending time and seeing combat in said nation (Haiti in 1996)).
Anyway sorry for delay in posting, am catching up now. Had a hell of a week at work!