Eagle makes very good points. You definately want the coaches to know him, call him by name, and feel the connection & commitment.
A couple more to consider: These things cost, are you putting all your financial eggs in one basket? Or are there more opportunities for other schools to see him? What's the W & M roster look like? Do they need someone at your son's position? The best advice is always 'go where you will play'.
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From 'Nice Guys Finish Last' by Leo Durocher:
Baseball lives at the center of a never-flagging whirl of irreconcilable opinions.