After much hesitation, I decided to go to #FOSSY2024 and was pleasantly surprised by the amount of voluntary compliance... though I suspect that is unfortunately quite rare. The leadership at #FOSSY also committed to masking up, which I think was significant.
It was also a local conference for me, so a bike commute; I would be a bit more nervous spending long hours on planes or trains or busses.
Good luck and hope you manage to stay safe!