Instead of using a lot of cover scent, you need to set up to prevent them from smelling you. Keep a ditch or river on your downwind side, or a rock bluff, anything that would make it impossible to circle behind you. Go to a new area, chances are, they are on to you. You'd be surprised at the number that respond that you don't see.Take a buddy along and set up on a pasture, and use the buddy as a downwind shooter. They always circle in from downwind. Walk at least a quarter mile from your truck, and as quietly as possible. Since you're in a wooded area, I would use a distressed fawn call. Don't call too loudly or too often. Setting up near thickets would be good also. If distressed calls aren't working, then switch to coyote sounds. Before daylight, hit the coyote locator call, if any are around, they will answer. The female coyote invitation will work good too. The distressed coyote pup will bring them in too.
If you can locate them with the coyote locator, slip in as close as you think you can, then set up. Just at the break of day, try the locator again and you might call in the entire pack.