IFEZ, I flew into Oshkosh a couple of times last year. I flew in there on the Sunday prior to the show (the busiest day). A plain language document explaining how to get in there was probably the best document I've seen for this type of thing. Flew in from Portage Municipal.
The ATC's there are superb. Without peer. I doubt you'll go anywhere where more courtesy is shown amongst the pilots, there wasn't anyone cutting off other pilots or pushing in. And there was absolutely no talk required from pilots.
I flew in and out of there (start and finish) and once during the show. No ramp checks, no ramp nazis. Just friendly competent people helping you out.