Go, it's a good time. My son played for Philly/Metro (Jrs) 2006, 2007, in York. They were the bad news bearsdidn't win any games, but, by the time they left, everyone knew who they were.
As far as what you do in your spare time, you're pretty much on your own. I'd like to see a little more off-the-field socialization, tho. Kinda hard to do when teams are scattered in different hotels.
I would suggest minimal cell phone and laptop time. Make him get out there and work it.