Taking the I70 route is a little on the dull side. Pennsylvania will have some scenery, but Indiana is not much to look at (sorry, Boilermakers). It is a relatively smooth ride. Some hills, but not a bunch and nothing big.
The I40 is more scenic, but you'll hit some climbs (and drops) in Tennessee and again as you approach and enter Virginia. Nothing you can't handle, but it's a more hilly route. Once you hit Virginia, you'll drop into the Shenandoah and it's flat from there. If you go this way, DO NOT approach DC. Go the long way around, traffic is a nightmare and the lanes change frequently.
I've driven both and had no problems either way. If I had to choose, I would take the southern route because it's nicer. It might be a bit more fuel, but you'll avoid the tolls on the northern route.
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2021 Holiday Rambler Armada 44LE
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