First by naming specific locations you hunt, it only encourage and educates more to try it. If you like pressure, you will enjoy more of it.
Secondly, it depends on the spread used, location and how many you use. Lots of factors, factor in as well. Bad concealment and you still won't better yourself with a dozen of them.
If the birds are flaring off them, then pull them or shift where they are located, so you can shoot the birds at they point where they flare. Given they are in range. The unit you mention is also notorious for skybusters as well. Windy days and cold will help. Best of luck to you.