I've been meaning to get to UPMC Park in Erie, PA for years and finally managed to visit recently. As far as AA-level stadiums go, UPMC Park feels a bit more built up (at least by comparison to others that I've visited)... a good amount of open space, a nice team store, and the field is viewable from the concourse area. I know there were some upgrades in recent years, and also that the netting was also extended (a friend of mine attended some games previously and mentioned feeling super nervous because numerous foul balls were getting hit into the stands along the base lines and there wasn't netting at the time). It doesn't have its own parking lot, but I parked in the garage nearby and it's easy to just walk across the street to the stadium.
The day game that I attended had, maybe, 35-40 people in attendance... but that's pretty par for the course for a matinee game during the week, especially one at the end of April. In line with that, it's probably unsurprising that multiple concessions were closed and the in-game media and entertainment was, well, pretty lacking.
That being said, there's a certain level of appreciation you can have for the game when you're watching a minor league game in a stadium like this... a kind of intimacy that you don't get when attending a game at a major league stadium. A minor league stadium worth checking out at least once. read more