TPM, you have given candid insight to what Milb really all about.
For longer, very colorful, readings about inside the Milb, read:
1) Josh Hamilton's biography, "Beyond Belief",especially if your son is considering the draft after HS (aside: not all players are grounded in their faith/beliefs like Bryce Harper) and,
2) "The Bullpen Gospels", by Dick Hayhurst. (highly recommend - you will LOL!)