My advice would be to scout around and find a different place to hunt. Ducks move. They do not feed endlessly in the same spot. May have been hunted out of that spot by others...may have moved on. You need to find some birds in a different spot. Locate exactly where they are in that field. Note the wiind direction and strength, watch from wich direction they come, HOW they appraoch, move before alnding, and then WHERE land. Then return, set up and conceal your self really well. You will figure it out, but ya gotta do the work.