Dow,
I agree with what njbb said
From my experiences, I learned that attending open tryouts when I was in HS was a great way to get more experience when it came to showcase situations and being able to play in front of scouts.
But how old is the HS player? If he is younger not much will happen aside from the scouts that are present will see his name and if he has a good showing they will more then likely remember him and look for him next year. If he is older they will probably approach the HS player once the workout is done, or contact him several days after if he happened to impress them.
As far as traveling to the next state, well I'm from Canada, I used to drive from my hometown down to Kalamazoo in Highschool to go to a try out or two for the Frontier League, again I found it great help for when I went and attended a few PG Showcases.
Hope this helps or at least gives you some ideas.