I have never hunted the prairie units, but they certainly have birds in them. They tend to stick to the draws and river valleys, and can be pretty concentrated. There is a lot of public land in many of these areas, but you do need to be careful and make sure you're not on a res unless you are supposed to be. As far as the road hunting thing in the hills, I have never had a problem with road hunters interfering with my hunt. I think you're misunderstanding what people mean by "road hunting". Some people drive the roads, get out of the car and call to try and locate a bird, then if they don't get a response get back in the truck and drive another 1/4 mile. Someone actually shooting a bird from the road is almost unheard of. Roads are typically along the side of a hill, or in a deep valley. Combined with the woods there really isn't much opportunity to see birds at a distance.