Mauser,

Sometimes this happens when there is a shortage of hens. The toms are competing for a limited number of ladies, so they actually follow a pretty similar travel pattern. The gobblers will stick together and actually perform a more ritualistic lek behavior, ie. they will strut and parade together for the few hens.

I've seen it happen in NY and CT, in areas where there are good numbers of toms/jakes and not as many ladies.

Of course, as soon as the season starts, I'm sure each one of those gobblers will have at least one hen apiece. Funny how that always happens, huh?!