I have been using those "moist-earth" scent disks that I hang from my hat, and I've found them to be great as a cover-up. Additionally, I just picked up some fox-urin that I'll try to use as an additional cover (pour it on my boots/ soles) ....I've read a fair amount of positive things regarding the fox urin. I'd stay away from skunk because although it is not a threat to Deer specifically, it represents an animal that is distressed and may make the deer even more wary. Additionally, I wash all of my clothes in scent free / UV block detergent and shower in scent free/ anti-bacterial soap for 2-3days before hunting. I hope this helps.
"Measure twice, shoot once <img src=icon_smile_evil.gif border=0 align=middle> "