I'm wondering these types of Zara jacket enough to keep me warm for my coming Korea trip during mid November.

http://www.zara.com/webapp/wcs/stores/serv.../269231/Jackets

The average forecast temperature for mid November will be 5 – 15 degree Celsius (°C).
I really don’t like those winter wears from universal traveller.

Do we really need a thick down jacket for 15-5 degree celsius?
Cant imagine how weird when i m wearing thick down jacket walking in Seoul city while the locals are wearing light jacket.

Nothing much mentioned in any brochures about Seoryani forest path. But I got to know this place from Secret Garden Drama & I emailed Jeju Tourism Organisation to get more info. If you like light hiking this is the place for you .The trees and surrounding so peaceful.

Ok, below is our itinerary when we were in Jeju. We stayed for 03 days 02 nites.

Day 01
Arrive Jeju 0905hrs and collect our rented car. Head to Jeju Stone Park, Jeju Mini Land, watch Fantastik Show. Visit Chocolate Museum & Jungmun Cliff. Chk in to the Jeju Hiking Inn.

Day 02
Visit Seopjikoji, Majanggul Caves, Art Trick Museum, Saryeoni Forest Path, Jeju Folk Village & Cheongjiyeon Waterfall. Along the way we drive via the coastal road and take a lot of pictures of the big wind tracker.

Day 03
Early morning hike and climb Seongsan Ilchubong to see sunrise. Return to the hostel, take shower and drop our rental car. Take the shuttle bus from car rental deport to Jeju International airport.

What you should do is to head to MATTA Fair and get Jeju map. I noticed KTO doesn't have details Jeju Map. I went to MATTA Fair 3 times last year to get the Jeju map and more info on Jeju. Then I start draw my itinenary.

Jeju Mini Land, Art Trick Museum and Seoryani forest path are on the same route. Seopjikoji & Seongsan Ilchubong also on the same direction. Jeju places of interest are divided into East & West. So you need to chk the map and draw your own itinerary base on how many days you have, what do you want to see.

You will need to stay longer if you want to climb Mt Hallasan. Many people underestimate Jeju Island. Thinking that, Jeju is only small island but it is not tha small and also so many places to go and see. I'll definitely return to Jeju and stay longer.

We wanted to visit Art Trick Museum on Day 01 after from Jeju Mini Land but because were rushing to watch Fantastik Show, we have to visit Trick Museum on the 2nd day.

To save time, why don't u just go and visit Halim Park first and then chk in?? I have never been to Halim Park so I can't comment.

It actually depend on what time the sun rise. We arrive at 430am and thought nobody was around to collect the entrance fee. Bu the moment we pass the booth, the guy tapped on the table ask us to pay the entrance fee 

I think it gets pretty early sunrise during summer. Depending on the season, weather the sun will rise early or later. You can also go to watch sunset. I think they closed after sunset.

This is the cost our my 03 days 02 nite Jeju trip

Return flight ticket: RM270
Accommodation in Jeju Hiking Inn (split to 3 person): KRW40,000/ RM112 (02 nites)
Entrance fees: KRW37,000 / RM104 (per person)
Car Rental (split to 3 person): KRW15,500 / RM43.40
Meals + tidbits: KRW25,000 / RM42
Fuel throughout our journey (split to 3 person): KRW21,000 / RM59

In my opinion, it is more cheaper to rent a car & drive yourself than hire a car with driver. Furthermore, if you hire car with driver, there's a limit time for usage and addtional hour will be imposed if you exceed the hour. Whereas, when we rent the car, we can go wherever we want and come back to hostel at anytime we want.