Getting into Stanford is a tall task. They are very selective. Stanford has highly regarded summer camps that are invitation only. Like any other camp, they are money driven, so if you have some talent one can find a way to get an invite.
During our recruitment time, we set the bar academically at what Stanford requires/accepts. You better have very, very high scores. In the end, that academic goal helped our son, and gave him more choices.
We have a friend who played at Stanford. His numbers, ACT 32, SAT 2100 and top 1% in his HS class. Also, he was 6'9" 235lbs. with a fastball 94-97 MPH. He was drafted fairly high his junior year, signed and played in the minors for several years. He also earned his degree in 3 years.
Stanford is a a great target to set and if you son can make the grades but doesn't get love from Stanford, he will do fine getting into other programs. The Stanford camp is very well attended by many of fine programs.
Encourage your son to work hard on his craft and to work equally as hard on his academics. Both are needed to find a good fit.
Good Luck!