Accept no substitutes.
jk, lord knows we are blessed with some incredible scenery/roads in the US.
But for myself, it's another world over there. Granted I'm a bit passionate about crooked roads, not sure what it would be like as a passenger (or on 4 wheels). I remember a stretch of highway in Austria, I was caught behind a tour bus and seeing a guy in the back looking wistfully(?) at me. And thinking I'd rather stay home than trade places with him.
I'd suggest going in May or September.
Jim