I think Gonzaga's down year was an anomoly. To begin with, it is a great school and the baseball facilities are first class. There is a "sky bridge" across from the school to the indoor hitting and pitching facility which Bum, Jr. visited dozens of times for training in the winter. (No, he doesn't play there.) That training facility will ensure your son is ready come Spring.
Is your son a pitcher? Steve Bennett, their pitching coach, is a fantastic instructor. The best pitching coach Bum, Jr. has ever had.
I currently live in Las Vegas but spent 21 years in Spokane. It is definitely cool --even cold-- in the Spring in Spokane but they have great Summers and Falls. The town is very family-friendly, and just the right size for your son to thrive (about 205,000 residents).
If your son is being recruited to Gonzaga, it should be close to the top of your list of schools. If he is just on a "list" for a prospect camp, be careful though as they are famous for stacking these camps to subsidize the non-prospects. Overall though, if your son is talented, it is a great choice. Good luck.