Hell, if you're coming for a weekday afternoon game, you can park on the street for free right by the stadium. You just have to be moved by 6:00 or so, which should be no problem for a 1:20 game. To get good seats for a Wednesday game, you only have to get there when the gates open (2 hours before) or maybe even a little later than that. People go to games from work and don't tend to get there as early during the weekday games.