The trick is to fool everyone you pass on the way to your spot so they think you're just road hunting and they won't follow you. Then you hit your spot and park and begin the hike, slay a monster and drive back all the while they think you road hunted and are lazy and dont think none the wiser. 
Some places I've been are like that. Animals hide in plain sight and a quick hike reveals them all. Guy's drive by going deep and steep miles away, and have no clue a nice buck/bull are right there. 
You ain't kidding. I'm always surprised by how many good spots are just driven by.
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