Atlanta Fantasy Fair 10, 1984, at the Omni hotel. GOH was Larry Niven. This had a lot of memorable events. My first time driving outside my home town, the first time I ever stayed in a large hotel like the Omni, the first time I ever saw a science fiction writer and heard them speak about their craft, the first time I ever saw anime, etc. I forget if I actually played any games there. My first peice of Con Swag was a Buckaroo Banzai headband, which I still have.
If you're wondering what this con was, it is no more as far as I know. By, oh, 1995 or so it had been pushed out of the running by Dragon*Con and was banished to the Perimeter, where it died not long after. I went to the first Dragon*Con when it was a little bitty thing and was held in October. (That was a memorable Con because we got turned around and missed a turn-off or something, sending us down Techwood after dark). That was a much more enjoyable trip than what DC has morphed into.