Chuseok is sort of Korea's Thanksgiving & one of our few 3 day weekends in Korea, which means, we were determined to get out of Seoul and see the country for a belated anniversary celebration. At least 10 times we heard, "Are you sure you want to go, there's soooo much traffic?!" A Korean travel blog called the weekend "the mass exodus out of Seoul" because many of the 25 million residents of the Seoul area skidaddle out of town to their ancestor's roots and visit family and grave sites.
Lucky for us we defied the laws of Chuseok, and didn't get stuck in traffic - going east out of Seoul a pleasure because all of the traffic was headed somewhere else. (Theories are that it was because most people travel south, few east, and because Chuseok fell on a Friday, Saturday, Sunday less people were willing to travel.)