i think gateway closes its gates pretty early, like 10pm or so, but i think you have to be there, signed the waver, and given your pass by like 8pm.

the car won't have to be tech'd once you have your annual, but you do have to go to 'tech' with your logbook and helmet each event.

concessions will be open, but i always bring food with me. as scott said, there's a massive truck stop across the street that probably has lots of stuff.