Help juggling a one-week (9 days) itinerary in Seoul, Jeju and Gyeongju

My highlights for Seoul would be Gyeongbukgung Palace, Insadong, Namsan Tower, the War Museum (via Samgakchi Subway stn) & Namdaemun Market. All else is superfluous. If time, a USO trip to the DMZ (full day, departing 7 am). The fish market in Busan is often cited as a must see. I've never been to the one in Seoul or even the more famous fish market in Busan. You won't regret spending a day or 2 in Seoraksan instead of Seoul.

hi i read with interest with regards to this post and thought i can ask a few questions here.

thank you for advice.

i will be going to korea end of oct till beginning of nov this year. where is the best place to see the transition of leaves colour??