I don't know about vanilla. I agree that instead of a cover scent, it would be more of an attractant.
For me, I keep things simple. I don't use carbon suits or spray or anything like that.
The one and only thing I do is, well maybe two, I always try to shower before hunting with a scent eliminator, but I don't always have time.
For my clother, I seal them in a plastic bag with these scent wafers. I believe they are made by HS Scent. I get them at Walmart and use the dirt scent. It smells like dirt. Thus far, I have never had a dear smell me. I've had themunder and around me, but they haven't seemed to smell me, even after sweating, some times alot.
I do try to watch the wind, but that isn't always possible.
Being still and quiet is often what is most important.
I like to keep things simple, in fact, I've never had much noticable luck with doe in heat scents. Find a travel route, get out of sight, stay still and quite, and wait for the shot.