Not sure about Denver, but some things I have learned going to games here in Phoenix. Dont buy from scalpers, unless the game is already sold out you can usually get tickets at the gate cheaper. Here you can take in your own bottled water as long as the seal on it hasnt been broken, so there are lots of people selling bottled water for a buck outside versus $4 inside. If you sit in the cheap seats for the first few innings and scope out the good seats that are still empty you can usually move down in about the 5th inning. I like to take my binos, its cool to see what goes on in the dugouts and the bullpen during the game, watch the players on base talk with the opposing players between pitches, and check out the talent in the bleachers between innings. If I were going to watch the Rockies I would try to make it on a day when Uboldo Jimenez was pitching.