Our football district voted in favor of no visiting bands after being presented with a resolution we adopted with our atssb region. It helped out to have more schools saying the same thing. Our opponent this week is the only band traveling to our stadium. After learning they were traveling the coach tried to start nudging me to go to next weeks (non-district) game. Even with the huge stadium, you're still facing the bathroom issues.
Add in if it's a longer away game and you're dealing with food you have more concerns there. I know there are many people who are happy and willing to go on with their lives and pretend things aren't going on, but especially with evident transmission in your group I would take the careful road with every step you take moving forward.