My God. I'm an HD at a program in Dallas ISD and let me tell you--we are taking this thing absolutely seriously. I'm lucky to have marching rehearsal outdoors each day, but it is indeed fully masked and 6' apart. Our drill is designed 6' apart. Our fundamental/music block is 6' apart.
We have NO indoor anything (except percussion front ensemble occasionally). For the recent rain, we just had to flat out cancel rehearsals. Didn't have 'em.
This puts us waay behind where we should be, but that isn't the most important issue here. Wow.