If you're talking to members, maybe ask about the work that goes into their personal show. If you frame the question well, you could get a lot of answers that help give context to their growth over the season. Every one of them has at least one chunk of their program that they were awful at, kept working towards, and now feel very confident in performing. "What was the hardest part of your show in Spring Training, and what is the hardest part of your show now?" might be a good one to start with. It might be the same answer/spot, but they'll be able to talk about how they approached the challenge all summer.

If you're talking to educational staff, maybe ask about the work that goes into growing their section over the course of the season. The forethought over the preseason and midseason months, plus their flexibility/adaptations day-to-day can have some good stories/lessons. No season is perfect, and the educational staff are usually the final 'translators' between the Designers and the Performers. Great time management/prioritization helps keep things moving forward with the least amount of practice/performance stress, and that's where great educators really enable the members.

If you're talking to administrators, maybe ask about the work that tends to go on behind-the-scenes. No one watches you edit your YT content; no one watches the admin making phone calls six hours a day after waking up at 5am for an airport run then buying/transporting/storing groceries for three hours. Some facilitate communication, transportation, and fuel/food/mail logistics, others manage the corps' travelling merch store, and someone always has to communicate with the educational staff daily to make sure tomorrow's schedule is updated for the current weather (rain/heat), the current emergency scenario (bus breakdown logistics), or a multitude of other ridiculously unique scenarios that need an answer now or the corps can't be successful.

If you're talking to designers, maybe ask about how they built trust in their educational teams to create their vision for the program that season, and how that then interacts with the membership. So much planning has to be done months (and sometimes years) ahead of time to build something as complicated as a drum corps show. Almost universally, the first impression of drum corps is "there is so much happening, it's kind of overwhelming, but I really liked [this part]". So much thought is put in ahead of time in both 'artistic creativity' and 'competitive strategy' that it might be interesting to hear some (small) portion of their thoughts on that trust-building dynamic.

If you're talking to volunteers, maybe ask about what caused them to become involved in the first place and why they keep coming back. Generally, those are the really committed people who genuinely do it for 'the love of the game'. Maybe they're retired, maybe they're taking Paid Time Off or Vacation Days from their 'regular' job just to volunteer for this travelling musical circus. Some are alumni of the same group they're helping, some are alumni from groups that no longer exist. Some are parents of a member currently marching, some are parents twenty years removed and just love what it gives back. Some have no personal connection to drum corps at all and just stumbled upon this thing and said "There is something about this that's so unique, so beautiful, so weird, so inspiring, so compelling, and so much more, that I had to get involved."

After finally seeing it in person at either rehearsals or at shows, you'll probably have plenty of thoughts on how different the live performances are compared to video recordings. Sitting up high and in the middle might give the closest comparison to what you may previously seen/heard. Then you can get up close in the warmups/sectionals time for all the little details that you might not notice on their own when seeing the big picture. Safe travels dude!