Well then Omni, that boils it all down to a night inspection then. When I was a newbee I was contemplating doing an OA treatment about 10:00 at night. I asked about it first on this forum and I got a resounding shout "NOOOOO!" from the pros. You would think that the bees would be quiet and cooperative at night when they are tired from a hard days work, but quite the contrary.
And I might add, that if you get stung, say on the knuckle, or the kneecap, or the ankle, it hurts a lot more than if you get stung on the upper arm or thigh. The larger masses of muscle, tissue, and fat can absorb the venom more easily and the sting isn't quite so concentrated as the small amount of tissue around a knuckle.
This is a good thread Omni, we learned some cool stuff