Free: Contests & Raffles.
I have had great luck with it. But you gotta get out early and be freindly. They really do not like the guys who just pop in or call the nght before season and expect to hunt next day.
Ask about property boundaries/ landmarks........This will help as well..... I can't stand it when someone asks to hunt and doesn't ask about boundaries/off-limit areas/ fencerows, etc.....