throw some milo in your feeder along with the corn. little goes a long way. help keep them around longer.
that is what we do. Pigs and deer can clean up all the corn but not all the milo. Deer actually prefer milo if it is in a pile. I have shot enough big toms and actually prefer the younger birds. They eat a lot better and you save the big ones for breeding.
Turkey love milo, so do deer, pigs and dove. Wheat seeds are good too but it's really light and blows in the wind. If you want to go lower cost, get bulk mixed bird feed and mix it with the corn.
I have a couple 55 Gallon Drum Turkey Feeders filled with a bird food mix that I put out this time of the year. Turkeys will start feeding on bugs pretty shortly, it also helps to simply run a harrow or an spike aerator and fertilize. That will start new growth and attract bugs.