ok if a strutter is comin in and gobbling decent the best tip i ever got was to shut up. if he is comin then he thinks there is something worth taking a look at. if you do feel the urge to break out the call then like JW said light calling. my sequence that pulled one in this morning and other times.
putt, purrrrr, putt putt, purrrr coupled with a little leaf scratching to simulate a feeding hen should put his mind at ease. the purr is a contentment sound that turkey make when they feel safe while feeding and such.
if your are using a hen face it away from where the toms are coming from. he want her to see him so this will force him to come into the setup to get her attention.