My son went to the Area code tryouts/selectfest/a local top 100 showcase, his summer travel coach was helpful in getting him place in all three. All three were very good with a large number of coaches and scouts in attendance.
One thing to be aware of if your son is a pitcher is that all three of these were close togehter.
Good news is that he did not throw a lot in any one showcase but something I think back and wonder if he should have done just two?