Getting pics?

[beard collecter45]

THis year i want to make sure i have my eyes on our goblers and i want to know any tricks or tips or basically how to get good trail cam pics of the toms and jakes and hens basically our whole flock. Can i leave a decoy out for a few days in front of the cam or will they get smart and know theres something up when i use tht same decoy in the real season? Help would be greatley apreciated