I have noticed only one natural scrape being worked so far, which is one that is used annually. A couple others have not been touched, but I'm not sure when they tend to start to use these. I haven't walked thru the heavier timber much tho as I'm trying not to disturb things too much.
But I would think that if they are starting to be more active like others are saying, and these stands are in good travel spots, then it wouldn't hurt to give them a try.