re: I need tailgating advice from the pros.

Well if you get there on Friday and set up at a spot where you know the same people set up every week I would consider that being a douche. On the other hand if they don't have some kind of place holder by Friday evening/night it's fair game. It's not a rule it's just something people do to be nice. I'm into being nice, if you aren't and don't care then cool.