If it's a really good job, the best approach would be not to advertise it at all. Let the opportunity spread by word of mouth, and see who contacts YOU first. They're the ones who really want the job, and they'll hear about it because other people in the business will tell the people they think are most qualified.
Also, if you know a couple of very good superintendents, just tell them you're looking and it will speed up the process outlined above. That's what we did for Forest Dunes, when we found ourselves looking for a new man on two weeks' notice last spring ... and it took less than ten days to identify three candidates with recommendations from Chicago Golf, Oakland Hills, and Bandon Dunes.