I recommend taxi travel very much. well experienced and kind, they give you the best guidance in Asia. I liked it so much and i traveled with taxi driver for 2 days. But for a day, i traveled on foot to visit olle trails
and some local attractions. As a backpacker, i got some useful info from allaboutjeju.com blog. So if u don't have time and don't wanna spend time planning, go for a cab. But if u cannot afford it for your whole stay, get some help from the internet web.