How early should I arrive to the game?

30 minutes before game time is plenty of time to get to your seats. Go earlier (up to 1.5 hours before game time) to walk around the stadium and watch batting practice while the crowd is low.

I show up a couple hours early so I can hang out in the parking lot and get nice and drunk so I can minimize the $13 - 18 $ per beer buying experience

As early as you want