[dennis in se pa]

Actually you can stay overnight in the infield. The problem is - don't leave once you get in (Thursday afternoon) or you won't get back in. There is an official tent camping area, and RV camping areas. But I have seen many people just put up a tent in a spot that won't get driven over. I had been going regularly since the 70's. It is more like a circus than a race now a days, ferris wheel and all.