Here in the lower penninsula of Michigan we are and have been for almost a year now under a bait/mineral ban. One animal in an enclosure tested positive for CWD, and the DNR immediately put a halt to the use of salt, minerals or bait of any kind.
So beginning last August I started urinating about 4-5ft directly in front of each cam. Laugh and doubt it's effectiveness if you wish, but check out the link to the albums posted below in my signature before you decide I'm looney....
don