Just another suggestion. Perhaps when you go to these camps, take a SMALL packet of information with you, like a copy of the unofficial HS transcript, and a copy of your best SAT or ACT scores, maybe a schedule of upcoming games. Three pieces of paper stapled together, perhaps with a photo of the player somewhere (like on the schedule). Gives the coaches something to have in their hands about your player, as well as solid proof of the academics, and if they are interested, where and how they can see him play without them having to contact you again for more information. Makes their jobs a little easier. If they are interested, they have the info in hand, if not, they don't have to keep the packet. If they don't have a need at your position, then perhaps they pass the packet on to another coach they know who does have a need at your position.
Just a thought.