When we moved from NY to CA, we elected to drive, since the company was paying. Saw a lot of the country that way. It was, um, eye-opening. Texas is one of the flatest places. There's a rock formation called Tucumcari in New Mexico. You can see it 2 days' drive away in Texas, that's how flat.

Took the southern route, since it was March.

Did it once, never need to do it again.