I threw this together for anyone interested, its a map of the area marked where each of the other spring training facilities are for reference.
Almost every ballpark is within a couple of miles of one of the major freeways for quick access.
The Reds Goodyear Ballpark is marked with the "A".
I added where the Dbacks & Rockies ballpark will be next year. In 2010 they are playing in Tucson about 100 miles to the south.
For distance purposes, the distance between Goodyear Ballpark and Hohokam Stadium, where the Cubs play, is a little more than 30 miles.