I've heard of gamer funk, and have been to many GenCons (this will be my 9th or 10th), and have found that it's actually not that prevalent. It's there, but not as bad as people make out.
Definitely a lot of crop dusters, though. People tend to eat a lot of burgers and chili dogs and other unhealthy foods.
If you're going to seminars at the games day, take a note pad and pen. Take notes and share them with us here on Dakka.