Patience is the key to killing large numbers of turkeys. They move around a lot during mating season, not all the time they are off the roost, but enough that they move 1/4 mile and more in no time at all. One can learn a lot about turkeys by simply watching what they do.....they will move in the same locations and avoid others for reasons only they know.
I sit from 20 minutes before opening, and depending on what is happening, determines how long I sit....never less than 4 hours.... take a break and hunt from 1pm till I sit another 4 hours and stay if the action calls for more time.
Nice comfortable chair and the ability to move some in a turkey tent will give you many more hours afield. Take a drink of water or a snack along, and make it nothing but fun.....the longer you sit, the better your odds are for success.
Here folks that use decoys have less success, because smart toms are not fooled...make them come closer to find out who called.....don't call if he is coming...let him come...he will take his time...remember patience is the key. If decoys are used ...hide them and make the the tom come close enough to see them....never place in the wide open here.....just sayin.