Thanks coach / camp director!
June 15th gives an informed player the choice to attend camp or not.
September 1st keeps the power, information and the player's money in the hands of the coaches.
September 1st keeps players in the dark and allows coaches to take more of the ignorant player's money.
Here is a little secret...everybody gets invited to the camp with a personalized "first name" email invitation...don't get fooled.