very good in pre rut before they start chasing/breeding does. look for the freshest and biggest scrape you can. Or I have seen guys make their own in a area they can better enter and exit using a licking branch tied down and some mock scrape pee. I have just the place I'm planning on hunting on saturday pm. My only hesitation is to walk a 1/4 mile throught he woods which will make more noise but my scent is blowing south of bedding, or walk above the bedding which will blow my scent their way, but I make no noise. Good luck.
As long as you aren't unreasonably loud, you'll be fine. Take the path of least resistance and get set up.
To answer the OP, it may be getting worked frequently, but if there isn't daytime cover near the scrape, the chances of him using it during daylight hours is slim. Regardless, I don't ever hunt right over a scrape. I prefer 30-50 yards on the downwind side of the scrape. That is where your best chance will be.