Are Diamondbacks tix easy to get on the day of a game? I am coming from Seattle and want to see a game during my stay. Scalpers trying to get of tix perhaps?

Is parking an expensive drag at the stadium? Is the food good? Are the third deck seats OK? (No way am I spending the $78 for the prime seats)

Also - any tips on nature things to do around? I am already planning on driving up to the Grand Canyon.

Thanks!
Any other advice about going to a game?