cbmom -
Remind your son that his best opportunity to express his interest is always in-person, while attending a camp. In this case, a follow-up letter to the head coach is a great next step. He should let them know he enjoyed the camp and is very interested in their program. Make sure to include his contact information, HS and/or travel team coaching references, and where they can see him play in the spring and summer. Best of Luck with recruiting!