Welcome to the forum, and Illinois.
Like so many other things, how you hunt will depends on conditions. I like to start by scouting with technology. Google Earth shows pretty good satellite images. Another great resource is www.mytopo.com
because is shows topography. I would use these two to try and identify any pinch points, funnels, bedding areas, conditions of neighboring properties, etc. It saves a ton of time trying to figure it out all from the ground, and you cant be more "low impact" than not being there. That said, nothing beats time in the field to learning the lay of the land, and learning how deer are using it based on deer sign.