well I have seen many different scents on candle's already
my only concern would be, well just because it smells like dirt to us, does it smell like dirt to a deer??
a candle will make the scent stick , as most are like an oil base deal, the smoake and such sticks to your gear and clothes a lot more than just a spray down
I do use them earth scented waffers, from them and keep several in a room I have just for hunting gear, and all my stuff smells like dirt to me as is

I do not get busted much on wind or scent that I know of, so sticking with what I do
so I wouldn't buy a candle but sure they culd make one very easy!