You are definitely right about hunting over bait and having an IR device mounted in some other location, eliminating white-out. I have used DC-Powered IR lights numerous times at a bait site. DoubleUp has experienced the same thing.
As to white out with all scopes, even Gen 3, let me ask a question since I don't know. Is the white-out on par with that of the Photon, or is there a difference, ie, is the white plume more noticeable on one and for longer times than another? I know the wind could be a factor as has been discussed, but I am wondering if both scopes, Photon and Gen 3, with all else being equal, would give similar results.
I do know that my home-made NV outfit rarely has white-out, though it has on occasion. What I have noticed with it is, that the white-out doesn't last very long and doesn't appear to be as thick as it does with the Photon. Makes me wonder what the camera has going for it that the Photon doesn't, and maybe if the Photon could incorporate that feature, whatever it is, to work better. I'm not sure about that and I'm definitely no electronics engineer. Just wondering out loud.