Squeeze,
Let me add only what I personally know of 2 "top notch" D-3's, one currently with a top 15 ranking and the other not ranked but went to World Series twice in past 5 years, which would fit my definition of "top notch": neither has 70 players come in to try out, both identify and recruit their relatively precise needs, and those recruited are guaranteed a roster spot their freshman year, but obviously have to earn their playing time; both have open tryouts at which typically anywhere from 20-35 kids show up, but the track record is that at most 1-2 players make the team from those tryouts.
There are cattle call recruiting schools, and if a player goes in with his eyes open and knows that, fine; it's when players are a bit deceived as to their prospects that I have issues. If the coaches are straight up with however they do it, by invitation or by cattle call, or anywherein between, that's all one can ask of them.