By definition, the carrying capacity of a small mountain town, is small.
Summit County is currently in drought. Where is more potable water for more residents going to come from? (That‘s a pretty big problem in most of the West as drought conditions show no sign of improvement.)
The cities are located where they are, because barring major changes transport costs going from cheapest to most expensive are navigable waterways > rail > road > air. Flying out of small airports is pretty expensive and not something that most Americans can afford to do regularly.