You just have to be close enough to hear the gobbling - no need to be in calling range - set yourself up in a spot where you can hear from a good distance
Go in well before dark and wait for the sun to rise , they should start to " free gobble" gobble on their own .... if no luck , hit em with a owl call if your good at that , if you hear something or still nothing , get moving real quickly to another area ,you want to locate as many gobblers as possible -- and sit a listen , repeat the owl , write down the angle of the gobbles from you from a compass on a map etc..take notes - pick travel routes that you can enter and exit without being spotted
Avoid calling with a turkey call while scouting this will educate the birds , if it get latter in the day hit em with a crow call
Avoid areas that you think have hunter traffic , go for the birds that are out of the way , and people will not interfere with you
once you find some areas with gobblers start figuring out the birds daily pattern where they like to roost , feed, where the hens are at, where the gobblers like to fly down to , when they gobble you might learn their daily route this way , what places they like to travel ? creek , field , old road , swamp bottom -- scout as much as possible , find what they are eating , where the hens are nesting - dont interfere with other hunters, its not safe
the night before the hunt(s) go out undetected before roost time , and listen for a gobble or two - hit em with a owl call , see if you can figure out where he is going to be in the morning --