This week is going extremely slow. Mainly because this weekend will be the only time I'll get to go to a game.

Anyway, not only that but my wife and I are surprising my parents, who obviously don't know we're coming. The plan is to walk up to my parents' tailgate spot, cooler and food in hand. My parents ALWAYS get to the stadium early, so my question is, what time do the parking lots open? Is it six hours before the game?
TIA