What about Sunday scrimmages at the park put on by a Doc of another competitive club? No tryout, just go play soccer games. Doc and side kick ref the games and everyone has fun. Phone calls if you made next years team go out when open season starts. The top coaches watch the the top players all season so they know who they want.
"Clubs and teams CAN NOT hold training sessions, clinics, kick-arounds, camps, festivals (whatever name you give it) for players OUTSIDE of your club AT ANY TIME prior to the publicized tryout dates. "
If it looks like a duck and quacks like a duck... What gets enforced is a different matter.
With a broad draw like your describing, all it takes is one parent who's kid didn't get an offer to make a phone call to create a problem for the DOC and his/her club. Charge $20 per head and call it a clinic "that generates revenue for the club" and it's a different story altogether. Bearing that in mind is why I think someone in this situation that started this thread was oblivious or simply DGAF.