Drum corps is a lot of work. Most corps start out with an open house in November, followed by "camp" weekends about every other weekend throughout the winter. Then, they switch to rehearsals every weekend from about Easter through Labor Day weekend (Finals). Depending on the corps and situation, they may work with you and your schedule during the winter, but as the competitive season begins, you will need to make sure you are available because every member is important. Most weekends during the summer begin on Friday afternoon or evening, meeting up with the corps for travel to the show site. Saturday morning will be rehearsals and then Saturday night is the show. You will probably travel back to the corps' home site after retreat, and then have a full day of rehearsal on Sunday. Rinse and repeat most weekends until September. I've been in the Marine Corps for almost 7 years, and it has been a little over 7 years since I've marched drum corps. At first, I was stationed in North Carolina, and Gold was about 3 hours away, but there was no way I could make that work with my schedule. Now, I am stationed in Hawaii and there are no corps out here. I do miss it, and hopefully I will wind up in Virginia or Florida next, and can make it work. Your best bet would be to analyze your schedules, making sure you understand that from about April through August you will have no free weekends to do anything other than drum corps. If you are okay with that, and it is definitely worth it, then contact the corps you are interested in and talk to the caption head for the instrument you play. I would contact them anyway, because even if you can't march due to your schedule, you can still be involved as a volunteer with the corps. Good luck!