In regards to skiing, I offer the opposite opinion of mikesaidyes. I would recommend staying there for one or two nights. Staying at a ski resort can be quite fun. After a day of skiing, being able to relax with friends at the resort beats having to worry about catching the bus back to Seoul. As for the skiing itself, I feel that the mountain caters to mostly beginner and intermediate skiers/snowboarders. The place will certainly be in good condition, with the winter Olympics soon.