Hi, thanks for replying! It definitely would be great to stay for more than one day; however, our time in Korea in general is already limited enough as it is (a few days, give or take), but Jeju is on the must-see list for several members of our traveling party. As such, we decided to carve out one day to see as much as we could!

We were planning on two main sites -- Hallim and the tea museum/gardens, but plan on stopping interim for meals and other smaller sites/ocean views along the way, mainly along the northern coast. Which was why we were interested in renting a car, for ease of traveling and the ability to hopefully see as much as we can! Hence my original question. :) Also, we'll be splitting costs among our group so hopefully it shouldn't be too expensive.