When we went to Maryland/DC area a few years ago we used I-79 and I-68. I wanted nothing to do with the turnpike in an RV. Crossed the turnpike to many times while stationed in NJ. I found the mountains or hills, which ever you want to call them not a problem for us. Our biggest problem was an accident on I-68. We set and crawled for awhile, but got thru it. I am one that does not plan my route to to much detail. I use an Atlas for the shortest and best way for me. No electronic route planning software or GPS for this old codger. JMHO.