Sorry to hear of your suffering. If a place is too busy, I just leave. It's not worth it. I still mask, and the biggest risk I'm considering is a short bus trip to get from the car park to the manor at a grand country house that's open for Christmas. Once inside, we can avoid everyone - sort of - but busses kind of shove you all together. Still pondering whether I can walk it, to be honest. I would but for a knee problem that's flared up.