There are good concentrations of food/beer vendors inside the track boundary but outside of turns one and four usually. These two spots have the widest variety of choices, and most of the time the turn four area has the largest seating area.
I'm there all three days too FWIW, could be cool to meet up
All who wander are not lost
"Play hard and FLOOR IT" Stevie Ray Vaughan
just remember: the only difference between genius and stupidity is genius has limits