Call even if you don't have dekes, they'll come in close enough for wing shooting.After you start dropping them, set the dead ones out as decoys, just prop the heads up, trust me, it works!
As for decoys, the Flambeau's are inexpensive AND work quite fine, I've been using mine for two seasons now and still look like new.
BTW, effective range with 12 gauge 3" mag #3 shot is around 40 yd.Using a feed chatter, they should come in even just to investigate, it worked for me many times.
Good luck and good shooting