Vedauwoo is a FS CG just off I80 between Laramie and Cheyenne. It's a beautiful spot. 10$ a night I think. At Rock Springs I stayed at the KOA twice but prefer the Fairgrounds just north of town. It's a large gravel lot with pedestals but cheaper and not as noisy. Sidney NE has a CG right next to Cabellas. Country View CG at Ogallala was decent but many years ago. There's a nice museum at Kearney NE. I've drove under that thing maybe a dozen times and never stopped until last year. I enjoyed it. It's about the Oregon Trail and westward migration.