I know/knew where he sleeps

I started watching this big Mulie buck in June. First time I saw him I was walking my dogs and he was standing still as a statue at tree line. I had been going back to a good vantage point and have seen him coming and going across the at the same point at dusk and dawn. This is a HEAVILY hunted area. This guy is no dummy to have survived here. Last time I saw him he was a tall 5X5, not sure how wide. I have not seen him since the end of August when the ATV's appeared. I know where he was bedding then. There are not trails or sign of human intrusion in the area at all. There is very much a "if you can't drive there you can't get in there attitude" here. Every time I saw him there was barely enough light to see!

Any tips on catching this big boy coming and going would be greatly appreciated?