I've killed many with a shotgun. My son and I drew tags this year. I considered using my bow but we want to use this hunt for a production. You have a few options. You will have to have decoys. Big goose shells painted white will work. You can wait until they light and shoot them like a turkey or shoot them before they land. Some places you hunt will have a ditch that you hunt from. It's nasty and you will need waders. You'll set decoys on both sides to leave a landing area in the middle. If you are patient you will get a 10 yard or less flying shot as they come in to light or fly by. If there is no ditch then put on a white coat and kneel in the landing area. You should have no trouble getting shots.
Hope the admin doesn't mind but here are some of our gun hunts. Skip to 8:20 of the first video and see your chances at a bow shot.