Twoson, ngkid,
PG puts together "PG teams" with individual players on them. My son did this one year when the PG National first started and it was a great experience.
As far as going to the event, you can not just show up and expect schools to magically find you, unless you are a complete stud, and by now they are all signed. Make sure the schools that you have been in contact with know when and where you will be playing, (and if not at least get some more emails out) so they know where you can be seen. I continue to be surprised how many parents and kids think that just going to an event some random coach is magically going to find them.
Good Luck.