RE: enter/exit trails?
While the final movement into and out of a feeding area may be on the same trail the deer will normally hour-glass their trails to an from bedding areas to feeding areas. The trails taken will always depend on the wind (when undisturbed) but if you could look down on the trails as the deer move back and forth you would actually define a rather hour-glass shape to the trails with the middle being the place where they make their decisions on moving back into the bedding area with the wind in their face.