"There's also plenty of opportunity for freelance field hunters," Ludwig says, "as lots of farmers want the geese killed." Among the top counties are Wyandot, Marion, Franklin, Delaware, Pickaway, and Ross. Insider Tip: The key, according to Crusey, is to know how the weather affects the hunting. Generally, when the marshes freeze, hit the reservoirs. When the reservoirs freeze, hunt the Scioto River and surrounding fields south of Columbus. Be mobile and flexible and you'll be in business.