after you locate gobblers the best bet is setup predawn and be patient. set a decoy about twenty five yards in front of you and do some clucks and yelps. Wait to see if you get an answer and if you do repeat the process. If the gobbler goes silent once it flys from the roost be on the look out for one coming in silent. If he continues to gobble cluck and yelp a few more times. You will be able to tell if he is coming in by the loudness of his gobbling. Once he starts coming make sure that you are in aposition to move very little once you see him he should keep focused on the decoy. don't make any sudden moves. the twenty gauge with 3" number 5 or 6s should do the job. make sure you have tightest choke you have in your shotgun and pattern it before season so that you know how well it shoots a given distance. there is no substitute for knowing your shotguns limitations and preseason scouting. it would be nice if you could hunt with an experienced turkey hunter the first year you go out.