The best place to find sheds is.....where ever you look for them
Seriously though...find wintering herds...search feeding areas, beding areas and trails to and from. Sheds could be anywhere in those areas.
Personally I concentrate on feeding areas and trails from January to march then once the snow starts to melt, I hit up the bedding areas, and only once in a while go back to the feeding areas (mostly because they are picked over by that time).
Pred