To expand on scents a little, I've used two cover scents with some success. Fermented fish oil really stinks and I've used it in areas that are fished a lot and the Deer are used to the smell of rotting fish guts. In fact I've had trophy Bucks walk right up to the fermented fish oil and sniff, almost like they enjoyed it.

The Lovage plant is another I've used as a cover scent. Kind of smells like Celery except way stronger. Hogs love the stuff, Deer accept it as a normal smell. Not a dry country plant, but fairly common in many other places. Check a small patch on your under arm before you use it on your clothes, I'm allergic to it. I use it at a distance.