Erno- Finding cedar thickets and trees is one thing that I need to do. There is another area that I hunt when the winds are favorable that have tell tale signs. Like you said "rub lines" are traditional in a patch of cedars year after year with larger cedars getting wore out. It is a favorite haunt you could nearly set your clock to.
This year I haven't seen any scrapes yet... Either because I have not found them or they haven't started here in TN. Generally the rut gets in full swing around 2-3 week in November. I posed this question because in this particular area I have seen a tremendous amount of scrape activity in the past however without seeing any rub activity.