I wrote a blog post about handicap-awareness at Gen Con. So, it's a little different than other blogs offering tips & advice for Gen Con. I'd repost the whole thing here, but I did use some language in the last paragraph that Eric's grandmother wouldn't appreciate (it's appropriate in-context, though).
TL;DR version: be aware while you're in the Dealer Hall that there are people in wheelchairs and they need space, too.
TL;DR version: be aware while you're in the Dealer Hall that there are people in wheelchairs and they need space, too.