If your son is a pitcher, or wants to work on developing a stronger arm, proper warm up routines and exercises, as well as some basics on the mental approach then the Jaeger Sports camp is without question the best you can find anywhere. Strongly recommended.
We started working out with the Jaeger group several years ago and can highly recommend them. Since we have been to so many of his camps we will not go for the full three days but will at least go to one day for a "tune up" to start to get ready for the upcoming season.
The other in the area, that we have not been to is the Cal Lutheran camp. I have heard good things about it. They are at:
http://www.ludawg.com/staff.htmlGood luck.