Another parent perspective - albeit a few years old already:
I had no real concept of Drum Corps - had never been to a live show or even seen one on the tube - when my son mentioned he was going to try out for Jersey Surf - a couple hours up the road from Baltimore. A friend from school was involved, and he thought it would be cool. The Surf is a weekend corps, so no big deal I thought. He got in (front ensemble) and started the routine of carpooling up on a Friday, back on Sunday. Well, one thing lead to another...
Once he got a taste of that, his connections with the community of drum corps grew. His travels gave him the urge to travel more. His performances gave him the urge to perform more. His skills improved, and gave him the urge to learn more. In the "off" season - back at high school, he started performing in local theater productions. His growing confidence lead to an opportunity to play as a percussionist with a touring Broadway theater company. That, in turn, lead to the urge to re-join DCI at the Divison 1 level. Traveling the country with the theater group made it easier to feel OK about trying out for the most remote Div 1 Corps from the Baltimore area - SCV. (Besides, they were the reigning world champs - why not join the best?) The routine now meant a cross country plane ride for camps. (By the way, surprisingly pretty cheap from Baltimore to the West Coast) Once he had spent some time in CA, the idea of going to school there (college by now) was not so out of the question. In part, the inspiration and excellence of the SCV staff lead to an opportunity to audition for the Conservatory of Music in San Francisco. The chops and the musical maturity he had developed by then got him accepted. The next three years it was Summers with SCV, and the "off season" with the Conservatory. Each complimentary to the other. Each equally challenging, each equally rewarding. He graduated and aged out the same year. I got to see some incredible shows. (Trust me, SCV 2000 was unreal from start to finish.) I'm still not sure I have a real concpet of what goes on out there, but I had a blast watching my son get involved. He paid me back simply by embracing the opportunity and demonstrating that it would make him a better man. It did.
After all, I can honestly say he was the one that made it happen. And I think that's as it should be. The only advice I have for anyone out there (especially the parents) is this: Expect the unexpected. This activity seems to take people to places they never thought they would be. One thing will most likely lead to another. Drum Corps becomes a thread in the fabric of life, no more or no less important than a thousand other things that must be experienced to be understood. Be open to it all.
A month from today my son gets married to a wonderful woman. A woman he met on tour. A woman he marched with.
Expect the unexpected.