It is indispensable. As for tickets, in most minor league parks you can just walk up and buy a general admission ticket. The seats are close enough that that's fine. But in a few places, like St. Paul or Durham, N.C., the games are so popular that they're sold out, and you have to buy in advance. This is a bargain.
Parking is mostly free.
People ought to see the Field of Dreams. You drive in on that curvy road, the way they do in the movie, and there are 30 people playing a continuous pickup game on the field. Inc. All rights reserved.