It's so that the hunter that are drawned can have the best hunt ,not having others setting up to close, not whorey about other hunters shooting at them .I live in ohio , some public duck hunting areas have been doing this for years .If it works like duck hunts ,You show up at a set time , fill out a hunter info card ,you are given a number ,they draw numbers to determins the "zone" draw order , pick your zone from those that are left and hunt .This draw system results in a better experince and more birds for most .For duck hunts there are zones for teams 2-3 hunters and single hunters. The areas that hold the draws are heavely hunted but you stll get good bird numbers