Congratulations to your son & family. Needless to say many of us here on the forum know the benefits of attending a PG event. For some it is a good benchmark against quality competition. Others it is a reality check that can help them decide to work harder to catch up. Still for others it is a spring board to get on college scouts radars as is the case with your son. We really enjoy reading stories like this because we know what you are going through and how happy your son is.
Anytime a father approaches me to ask what is the best course of action for their son, I recommend a PG event for all the aforementioned reasons. They are one of the best places to help your son get exposure, and are always professionally run. Needless to say, knowing what you know now, I'd bet you would have driven twice as far to get to that event. 