Imagine a large portion of your band contracting the virus and this thing lasts for a while. At the very least, your program could take a hit with the bad PR that could ensue.
More importantly you’re putting yourself, your students, and community at risk.
They make masks with holes/slits so students can keep them on without taking them off. You can make bell covers out of old t shirts.
I would do something. If nothing else, give the appearance that you are trying. Being cavalier as an educator during this time is too risky for me.