Both but best to purchase ahead of time.
They have tickets you might have to set in the grass, usually that's where we set we just take our chairs it's more comfortable
He is right. It is a very small stadium so it doesn't take much for them to sell out. Call ahead.
You can purchase tickets at the park if they are available. Best to call first and get them reserved, if you do not have online access.
Thanks! Your answer is awaiting moderation.