I lived down there for two years and with that basically lived in the parking lot in Maryvale during Spring Training. The best time for photos and/or autographs are during the mornings.....EARLY. Things are going to be chaotic this year, however with half our entire organization in the WBC....or so it seems. A great way to get some autos are when the Brewers are playing in an away stadium, go to Maryvale mid morning and you'll find guys always floating around. I used to see numerous HR derbys amongst the pitchers. Yo always won. Typically they would let people watch and go right down to field level in the stands. Since there were rarely more than two dozen people there max, the players were always willing to chat, take pics, and sign things. Also if you are hanging out near Camelback Mt. YOU HAVE to go to Arriba Mexican Grill on Camelback, just east of Hwy 51 about a block. The best Mexican we found down there, and it was a furious two year search. As for Chase Field, I know they give tours year round. However, I would doubt they are giving them during the WBC times. They are usually pretty happy to close down the tours/entire area if a big event (like the WBC) is going on. Eating at Friday's in there is usually pretty fun regardless of whether anything is going on or not.