What might the Wild West be like in a divided America? I don't necessarily mean a Confederate victory in the ACW, I just mean a "Divided States of America" scenario, which could theoretically happen a number of different ways.
It would depend on how the US was divided. Federally sponsored settlement was important in the interest of populating the Dakotas and other northern states west of the Mississippi. Without a common government, it could be difficult to build the transcontinental railway. Populating and developing the West would just be generally slower and less complete.