If you want to go to SD, look into northern Butte and Harding counties. There are a lot of walk in areas that hold a good number of antelope. I think the SD game and fish website has a map of the walk in areas. You can also call them. Some of the areas get hunted fairly hard but it is most always weekends. If you could go during the week you likely woudn't see anyone else. If you want to pay to hunt there is a lot of opportunity for that also. You should be able to shoot a 14" goat on public ground without much trouble.