If you've pre ordered the console, than you shouldn't worry about getting there early. Unless you want to be the first and/or get home faster. I'm leaving at 5:00PM for my GameStop just because I want to get home faster ( plus it's nice being there early in my opinion). If you haven't pre ordered, than yes you should worry.
Yeah, then I probably won't be going to a midnight launch. Sorry for all the questions, but how did you know your gamestop is having a midnight launch? I heard they weren't going to. Or did you just call and ask? Thanks `^^