But the point is, Stanford and Vanderbilt don't recruit from who shows up randomly at their camps - schools like that are out at the major tournaments, looking for the top players who are playing against other top players. Stanford Camp is like Headfirst and Showball, an opportunity to showcase in front of many HA schools; Vanderbilt camp does not bill itself that way, just sells a great experience.
In our experience, D3s will mostly not be at big events like WWBA, unless they are local - at least, the ones my son contacted told him they wouldn't. You do have to go to Headfirst/Showball or to regional showcases or individual school camps to be seen by many of them.