Another Friday Night Lyrics

Lyric discussion by tugit 

Cover art for Another Friday Night lyrics by Kenny Chesney

I don't know, but with $5 dollars worth of gas I don't get very far... Love driving though. Does anybody know what he means with "we go fog up the windows in the Smoky Mountains?". I'm not from America and English is not my native language, so is this a metaphor for smoking in the car or does he really mean driving through the fog in the mountains?