This is a hard question to answer, yet an easy one to answer. Where you go to high school has little or no bearing on where you go to college. How hard you work and getting the proper exposure does!
Are there benefits by going to select private schools for athletics? Before I share some of the benefits, I am very sincere in stating that any player working with appropriate instructors and trainers independently could accomplish a lot for half the costs of most private schools in the area.
Most of your private schools, in some form or fashion, work out in the fall and winter as a team. Most of the private schools will take a quality trip outside the area to play against quality talent: (Riverdale is going to Dominican and South Carolina, Dematha and St. Johns are going to the Westminster Tournmanet, Notre Dame is going to Myrtle Beach, I am sure Calvert Hall and Mt.St. Joe are too....)Lastly, which may only include Riverdale and Notre Dame, they play 45-50 games each spring.
So, with your son heading to a quality program like Severna Park, the better question may evolve around who your son works with during the fall/winter, and how hard he wants it. He has to know his only competition is himself, and that would be the same no matter where he goes to school.
If you have any questions, please feel free to give me a call at (301) 261-3123 and I will attempt to answer anything you ask.
Al McCormick