Can you expand on why you get better results over salt vs bait?
That is just the case for my property. I have seen very different results from food-bait versus salt from property to property, as well as some regional patterns.
Several years ago I began questioning the results of my late summer baited photo censuses (I wasn't seeing the mature bucks I was sure existed at the time of the census). So I set up an experiment where I ran concurrent dual photo-censuses, one with food-bait and the other with salt as the attractant. I got every age buck at the salt, with many, many repeat visits. Yet over food (corn), I could rarely if ever get the oldest bucks. Since that experiment, I only run my late summer photo censuses over salt-licks.
I have seen this pattern repeated on other properties, especially in areas with agriculture present in summer. On the other hand, I've also seen situations where deer ignored salt, but corn would draw them like it was crack. And I tend to see this heavy preference for food over salt in areas with the sandiest soils.