It is indeed Dale. There's a website that generates these maps, you just click on the states visited. This one contains any state I've driven through in my three buses.
Unfortunately, although planning on going through Nebraska on that last trip, due to the window leakage (which got fixed), and bad weather approaching, I took a more southerly route home, so I didn't make it to Nebraska or Colorado, which I had hoped to do.
I've still got a lot of "white" in the northern states, as you can tell.
Ray