Three days is enough to see the main web pages of Jeju, so within the map I've outlined where by to go for day after day. This assumes that you can arrive at the initial spot around 9am, and can be fatigued plenty of for meal and peace about 7pm. https://dean183us.theideasblog.com/34972542/5-simple-statements-about-visit-jeju-island-제주룸싸롱-explained