This year's 7th graders missed 1/3 of their beginner year, and who knows how much they'll miss this fall before we're back to normal. This year's 6th graders will miss a big chunk of their beginner year. Next year, both the 7th and 8th graders will be drastically behind where they would have been without virus shutdowns. Even the varsity band at the MS may be in trouble.
This year's freshmen won't get much of a marching season, so next year >50% of the HS band will be effectively new to marching. The next two years, the incoming freshman class are the kids who missed out on beginner year instruction.
I hope we can catch kids up and fill in the gaps, but we can't even start that until we're able to get into real instruction without virus concerns.