I grew up in rural southeastern Virginia. Many of the older men would use the term "scotch down" as a substitute for "hunker down". For example, when I would hunt with them, they would say, "Go over to that bush and scotch down while I drive the animal your way." I can't find references to the phrase "scotch down". I have read that "hunker" is based on Scottish. Perhaps these facts tie together? Any info on the "scotch down" phrase would be appreciated.