RE: C'Mere Deer
It's about as affective as salt water, but cost a lot more. Here is an experiment for someone with too much money.
Buyc'mere deer and then get a container or something like Mortons salt. Spread them on the ground about 10' apart, then set up a trail cam over it and see which they like more. If I were a betting man, I would be that after the first rain, they will either hit both equally, or the salt more.
I just don't have the $25 to waste on C'mere deer