We won a state championship at Loudon High School in 1970. That wasn't a bad drive.
Some states use neutral fields for semi-final games.
I went to a state championship with about 40,000 people in Tulsa, Oklahoma one year. Both teams were from Tulsa and it was at TU. The OSSAA uses something called cross bracketing. If you have a strong District/Region you can go farther in the playoffs without seeing some team from your District/Region.