Mike,
I know your always up to trying something new, have you ever tried vanilla. I have used it on occasions bow hunting and can't say I have ever had a bad experience - if anything maybe some good ones. A couple years I had a small buck come right in, walk directly under my stand and actually walk right up to the vanilla. If you've got the type of sign in your area maybe a little vanilla in a film container with a cotton ball might just be enought to make something extra currious. Just something to think about. No promises....