Since you know they are coming to the scape, I'd move my camera back a bit and try to figure out where they are coming from. I'd keep moving my camers down the trail until I figure out where they are bedding at. That is going to be your best shot. Find where they are bedding and then set up a stand near some of the entry points.
Only other thing I can think of for you to try would be to put a mock scape dripper at the scrape they are hitting and have it drip durring the day. That might make them mad enough to come check it durring the daylight to see who is marking their territory. I've never tried this, but heard it can work.
In all, just try to think like a deer. They need food, water, a place to rest, and durring that wonderful time of year.... a mate. That is all. Key in on these areas and you will find the bucks.