You're on the right track by getting out and watching some games and visiting schools - even this early in your sons HS career. Be sure to arrive at the field early - watch the warm-ups, enjoy the music (its usually going full blast), see the players interact with each other, watch the coaches. The process should fire your son up!
Walk around the university; get a copy of the school newspaper - see what it has on the game; it gives you a little feel for how the school/student body looks at baseball.
While speaking to a coach that early may be premature, if your son has the courage (and you arrive early), let him introduce himself to the coach - the parents need not be there for that. I know that my son at that age wasnt ready to introduce himself; but over the next few years he learned how. Baby steps; but necessary steps!