younge shooter

Does it make a difference what to choke to use when roost shooting ie wind and things in the way slowing it down. So what choke patterns would you use?

One oil seed rape field surrounded by woods and trees. one side open to a road. Flight line is in the bottom corner away from road where shall i set up, in the forest line hedge line or in the openeing under a tree? please help with what ever you can, much appreciated.

Thank you both for your replys. Will take what you said in to acount and try and think of smaller questions. Cheers!

Im new to this pigeon shooting. Coming over from shooting clays most weekends. I was told about pigeon shooting by an old friend, and have been out twice on my grandads farm. I shot two pigeons and a pheasent. But still both times nuthing has flown to the decoys. We shoot on an oil seed rape field surrounded by woods apart from one side which has a road running down it. We have established the flight lines but dont know where to set up the hide or what decoys to put out and in what shape. There is plenty of pigeons arround its just th piont of attracting them we cant seem to understand. Any help would be much appreciated. Thanks.