>>2120016>It's free>It's in a population dense area>Surrounded by several metro areas>A few major interstates pass throughthat's why it's visited so often, locals can use it casually, and there's many people travelling through.
The same factors all apply to the smokeys:
>Free>Population dense east coast>Surrounded by multiple metro areasCompare that to yosemite or yellowstone
>Entrance fees discourage casual use>Not surrounded by any nearby population centers>Far away/hard to access for locals (yosemite is 4 hrs drive from SF/LA, yellowstone is in the middle of nowhere) 
