if it were easy, everyone would be doin' it....
if you know that hens are the problem, move closer to the gobbler berfore daylight/light enough to be spotted. I've had success calling toms in this situation, if I'm the closest "hen" to the tom. in fact, the lead hen will NOT like you showing off,either...just like cows..there's always a lead female,get her attention, and the gobbler is yours. if hes convinced that you're "real" enough to pee her off, then he'll come to you...but that's not set in concrete(Murphys' Law has mucho power in the field)