It is often interesting to look at the list after it comes out and see where you stand with the tag that you drew. I put in for a deer archery tag for my second choice and drew it. Looking at the left overs there are only 4 left. Also my 4th season cow elk tag as a second draw isn't a gimme anymore since there are no left overs for my area.
There is good and bad it all depends on the unit. A lot of the left over cow elk tags will depend on some snow to push them off of the private property and onto either the forest service or BLM. Also for what is left you should know the area that you are buying a tag for and not go into it blind.
When it comes to scent, there are basically two types; those that attract and those that mask. I've tried both on many occasions. There are lots and lots of "doe in heat" scents, designed to attract a big buck into range. I've also used a "cow in heat" scent while elk hunting.
Another scent would almost be better named as a "coverup smell". The main goal is to cover up human odor or mask it. Though I don't believe you can ever totally eliminate all human...