I'm going on a road trip from the Wash DC area to Kansas. First time driving east like this. My concern are the mountain areas thru western MD, WV, and the like. I'm going to be using a trailer for the first time and would like to avoid steep grades. My current plan involves going west on 70. Does anyone know this area pretty well and can give me a "thumbs up" for no steep grades, or do you have any alternate routes in mind? Any thoughts on this would be appreciated! :) Thanks everyone!!