Here's what the Fort Collins Greyhound station looks like.

The grasslands through the bus window.

The McDonald's, Denny's, and truck wash that Tweek and Craig land at near the convenience store that is literally only mentioned once in passing. Also, the low highway overhead exists, too.

The real Intermountain Speedway that did indeed change its name some years back, as indicated by the letters that say "BIG COUNTRY SPEEDWAY" on the wall.

Wrote the graveyard based off of this one.

Downtown Laramie.

The real museum with the dinosaur.

The sunflower field is real as well, I think. The sources I found these images on are a little iffy and I couldn’t actually find the location on Google Maps but there are a lot of little side streets and stuff in Wyoming so there’s a very real possibility it does exist.
There are a lot more images I have in my notes app and the like, but they’re sort of boring. Sorry if this totally ruins your image of Wyoming, but to be honest this makes me want to visit the West a lot.