Thanks, I have taken 90 when I went to WY, SD sucks until you get to the Black Hills. That is beautiful. I was thinking of taking 70 but now I am think 80.Im planning on 90 through SD, MT this year on the way to ID. Have taken 80 twice to the same spot. I love the drive through NE (but I grew up there). 21 hour drive planning on going straight through solo. Leave at 3pm and arrive at camp around 12pm the next day.
IMO take 80. In NE you start off with the big city of Omaha, followed by a lot of ag fields, then in the western half western you get the sand hills, and some badlands type feel.