I tend to agree with some of the responses here that they stay out of the thick stuff to protect antlers and once they get the trigger to shed they seek higher cover. My area is entirely remote in big woods, meaning no farm fields are anywhere within 10 miles. I've been studying the shift and for sure it happens, but have not found "the area" where they go. Other experts claim they will be within 200-300yes in higher elevations, and within range of rub areas. More scouting work to do, but interesting discussion and I value others' experience.
