Free: Contests & Raffles.
One thing that I find people never bring or forget to bring that is one of the most useful tools is a Gazetteer. I don't know why but for some reason this gets over looked. I always have one of these in my truck for whatever state I'm hunting. I say this because it allows you to game plan on the fly, no cell service needed and it has so much useful info. I never hunted sharpies or huns so I can't speak to that but you can't go wrong with a gaze in the truck.