What I don't remember until recently is the prairie dog town near Gate 2--we walked through it several days this week when going to lunch at the strip of stores just outside the gate. There are hills on either side of the 4-lane divided road (and I'm guessing tunnels connecting those hills running underneath), some of them within a couple of feet of the sidewalk or street. And on nice sunny days, most hills have a resident prairie dog sitting there watching the world go by, completely undisturbed by the human presence so close.
I really wish I'd had a camera with me on Wednesday. On the slopes of one hill was a prairie dog, completely flattened on his belly. He almost looked dead--but no, he was just basking. Only the eyes blinked at us as we stopped to look at him. Must try to remember to take the camera to lunch when I go back in June.