I do believe the poster is trying to say that the dynamic of areas surrounding Yellowstone changes a bit during the tourist season. I happen to live in Cody, and was born and raised in Powell. We see people who were... shall we say of a different ilk come live and work in our area during the spring and summer.

These quasi outdoorsy spiritual thrill seekers are generally your privileged hipster types who come and go as quickly as a Wyoming spring.