I'm not attending, but wanted to say I'm very impressed by how seriously North Bay Python ( @NorthBayPython ) is taking COVID. They're even monitoring CO₂ levels throughout their conference venue and posting the values. 500-550 ppm--the range the linked post says they're seeing--is barely higher than outside, which averages around 450 ppm most places, and at that level you'd probably be safe without a mask on (though I'd recommend always wearing a good-fitting N95 mask indoors with other people, personally, and if everyone went without a mask the COVID risk would increase even with such good air quality). It means the air is circulating well, which clears the air of virus.
They're showing how's it done, and it's not too onerous (at least, they're making it look easy). Every conference should be doing this kind of thing if they care about their attendees.