I77 through West Virginia is about the worst choice for a coach that doesn't like hills. That stretch of Interstate is the only one I dread driving. To get around this, there is no good choice. Delaying crossing the Appalachian's until one gets to Chattanooga might be the best elevation choice, but there are many more miles involved.
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours