Due to the newish NCAA rules.. you won't see any D1 coaches at any of those events you listed. Send your kid to the actual on-campus collage camps.
Also:
* Make sure your HS coach is selling your kid. Coaches will talk to the HS coach before anything starts.
* Make sure your kid has the required NCAA core credits (I've seen more than one kid fail to meet the NCAA guidelines)
* Go to the school camps!