Checking new route from Black Hills to Cheyenne, WY

That may be a new route for you, but its a favorite of many RV'ers going to/from the Black Hills or Rapid City areas. Should be no problems for your rig. The only issue I worried about on that route was summer time road rebuilding. I would sometimes adjust the route slightly to avoid a major resurfacing road project.

PS there is an older, small Flying J station on 79 south of Rapid City, north of Hot Springs.