Actually, we hit the same farms at least one a year, some twice...they need to be in the right mode and sometimes you just get lucky. About 10 days after a full moon is ideal, and two Sundays ago was even better b/c the moon was just rising at daylight.
we always start out with a cottontail distress (hand or foxpro) then go to howls or a couple barks. If that does not work our "Go to" is coyote distress....especially after you shoot one.
Last week we had one sprint in on a cottontail, we shot him and sat there for a minute. Another yote started barking & puffing at us so turned on the yote distress then held on....had three more run in fast....that is where the shotgun is priceless.
The other key is always setup where the yotes have to cross an opening or you can see your downwind trail. Our best stands force a yote to come out 50-100 yds into a field in order to get downwind, we like a cross wind. If we have three guys we setup two by the call and then one watching the down wind trail 50-75 yds away....that guy kills alot, like calling elk