Being a former contest caller and judge, let me say this. It is a totally different game on stage. Forget what you do to kill gobblers and start getting your rythym and sounds right. You can have one and not the other and scores will reflect that. It is so difficult to impress all the judges that you need to spend a lot of time defining your program. It is a lot of work!!! For me to get to where I was it took hundreds of calls and tons of practice, not only calling but listening. I listened to any turkey sound I could get my hands on. Watched countless hours of video of real hens and even contests. Recorded myself to make sure I knew what it sounded like.
When I called at the Grand Nationals for the first time (and any time after that) it was awesome. The lights, crowd, cameras and so many great callers made it a special time for me. To be able to make the cut at that contest was just fantastic.
Its a lot of fun and you can meet some great people. Just sound like a turkey and give it a try. Good luck.