I do exactly what the OP mentioned. It's a camo neck gaiter that just covers my mouth and not my nose. Nobody gives a fuck folks! Then as soon as I pay, I pull it down and let people see someone with out one on. And it's never on in the parking lots. Again, nobody gives a shit and I see many people taking there's off when they see me without one. I could be more bold by not wearing at all and just walking in without it, but I don't know if that would have a positive effect by getting into an argument with a door mask nazi or clerk.