I agree with Charlie, not always best to hunt right on the hot scrape area. If you can find where they are coming from and line it up with bedding and feeding, that could be the ticket. A swamp can help some because they will try to find a way through where it is not as deep and it may be easier to find (like skirting a swampy area).
Most scrape activity is at night. Of course in some blessed states, I have seen a lot of daytime scrape activity - but don't think Maine or Louisiana are hotbeds of daytime scrape activity.