With my poults I put them in a brooder with sand as the bedding. I sprinkle turkey starter on top of the sand in addition to keeping a full feeder in the brooder. I dip each individual poult's beak in the water fount and that is the last time I touch any of the poults until I remove them from the brooder. I check on them several times daily as well as keeping their feeder and waterer full. I never catch any or try to have any of them come to me unless it is to remove them from the brooder to go to their new home.
Catching them when needed is different for everyone and different for their age. In my case, I start teaching my turkeys to be herded at a young age. When I want to catch a particular one or more, I herd them into the grow out pen which is about 8'x12' and catch them in there.
Other people can use the treat method where you get them to come to you for treats.