I would make th 20 a food plot. It depends on surrounding property as to wether you need a bedding area. If there's a lot of bedding around then draw em in with food. If no bedding near i would make a few smaller bedding areas and keep the 20 for food. A field that is cut once a year can be used for bedding and can be hunted just like a clear cut. I wouldnt let it become overgrown.