Some good sense coming from the posts so far.
I reckon one step at a time. Are you under or near a flight line?
Basic and classic decoy pattern set up, ideally with your back to the wind, try different things if nothing is coming in; rotory, flapper, bouncer etc.
Bottom line is, if theres nothing in the air where you set up, nothing is going to be pulled in by your pattern.
If you are game, I'm not massively far from you and don't mind coming out to give you a hand.
In the meantime, good luck and all the best,
Duncan