I have received following EM from Wendy just now ,, I am attaching the English translation, right below. It seems ,, you guys ,, all of you have to buy Wendy a tall ,,, since she is organising your docs ,, insurance,, booking on the ferry ,, all for 50 bucks.
Below is for the Incheon Airport ONLY!

Conversely ,, if you are coming by ferry from Russia, Japan or China ,, none of this applies. You just show up.
If your bike arrives to a sea port, by ro-ro or container ,, call Wendy as the bike needs to be customs processed and unpacked.

-------- Original Message --------
Subject: 잘지내시죠?
Date: Sat, 10 May 2014 12:12:05 +0900
From: wendy choi <wendychoi2(at)gmail.com>
To: Yun-Soo Park


안녕하세요
잘지내시죠?
한국에서도 꾸준이 바이크 타시나요?
5월부터는 역시 바이크들이 문의가 들어오네요
혹시나하는 마음에 정보 공유하고자 알려드립니다.
인천공항의경우

How are you? All is well?
Are you actively riding bikes, in Korea?
From May ,, I am getting lots of inquiries, from overseas bikers. I am sharing following,, just in case.
In case of In Cheon Airport

1.도착(여객,바이크)
1) Arrival (Passenger and Bike)

2.여객터미널 휴대품지원과에서 통관진행
비용
(500cc미만 - 120,000원, 500cc이상-1000cc:160,000원, 1000cc초과-240,000원)
상기비용은 관우회라는 곳에서 담보보증및 통관진행절차 포함한 비용이라고 합니다.
2) Passenger terminal PERSONAL EFFECTS department will process your bike. Customs clearance fees schedule.
Under 500CC - KRW 120,000 (USD 115)
Over 500CC - 1,000CC KRW 160,000 (USD 155)
Over 1000CC KRW 240,000 (USD 220)
Above charges are customs agency and security deposit.

3. 바이크출고(창고료 지급후)
** 올해부터는 보증금걸지 않고 보증보험으로 진행해야 한다고 합니다 **
운전보험료:약68,000원(4일기준)
제가 여객터미널에 운전보험들고, 서류 미리 보내놓고 있는데요
미리 진행해놓아도, 실제로는 바이커가가서 오리지날서류 다시보여주고
일시수출입신고필증 받아서 카고터미널로 이동 출고 합니다.
(3) Getting the bike ,, first ,, Bike insurance is appx KRW 68,000 (USD 60) for four days. (This I've asked to find the better rate. Basically you need this to get the bike out of the customs) then receive the customs permit,, head on over to the cargo terminal of the respective airlines,, (Shuttle bus every 5 minutes) pay the storage fee of some 5 - 10 USD ,, you hook up your battery ,, get the panniers on ,, then find the ferry to In-Cheon city ,, 5 minutes away. ( My self,, I hit the highway to Seoul,, thru the autopay gate ,, look for the cops and be in the city in 30 minutes)
Starting this year ,, the BOND is done away with! No more bond! So ,, if you are a non ATA conference nation, such as Germany, Swiss ,, you only pay the insurance for the bond. CA USD 100 - 200 or so.
(Bike insurance via other ports stand at 45 per month. In Cheon and Wendy needs to work on this)

​
9시진행해서 대략 1-2시정도 카고터미널에서 출고가능한듯합니다(기존진행자의 경우)
업무에 참고하세요
제가 서류 미리 구비하고 H/CHG : USD50 받고 있습니다.
작년까진 통관관세사 사용하고 CUSTOM CHARGE USD50 정도 청구했는데
관우회라는곳에서 관세사없이 일괄진행해서 앞으로는 CUSTOM CHARGE는
제가 따로 청구하지 않을예정입니다.
​​If you start the customs process around 9AM ,, you will be able to leave the airport, on your bike by 12-1 PM.
I will prepare all the documents and will charge the handling fee of USD 50 only. Until last year, I had to hire a local airport agent (requirement by the customs) and before I have charged 50 + 50 =100 ,, but starting this year ,, it is not necessary to do so,, from now on,, I will not be charging the clearance fee.

참고하시고, 문의사항 있으시면 언제든지 연락주세요~​
​Please be advised and if you have more questions,, please let me know.
Best regards
Wendy

So before leaving your home.. send following to Wendy ASAP
1) Your passport copy
2) Your international driver's license copy
3) Vehicle registration copy
4) Shipping documents (Bill of Ladding/Airway Bill) copy ,, all by fax or take the picture of your docs and EM here.

Send the fee for the bike insurance to Wendy by PayPal ,, so she can have the insurance ready for you. Rest of the fees,, you pay direct, to all the agencies and get all the receipts, and attach them to your temporary permit. (Don't loose this paper)
If Wendy has all your info , she can make the reservation, for the DBS ferry, with out a security deposit.

Do a Google, for the places to stay ,, such as youth hostel in Seoul.. cheap motels in Seoul, business apartments in Seoul ,, rent a private apartment in Seoul etc.
My home is in Sung Buk Dong ,, just 5 minutes, from Kyung Bok Palace and Secret Garden Palace, in the embassy row, on the hills, with tons of Korean restaurants,, Sam Chung Dong old town,, In Sa Dong, cultural street. Subways every where ,,buses ,, taxis cheap and they all take credit card, ,, even for two bucks or even a pack of cigarettes at a 7/11 and other kisoks.
At least 10 youth hostels 20 - 40 USD,, 20 motels 40 - 80 USD ,, 30 hotels from 80 - 300 bucks, 15 minute radius of my house.

Free maps, at hotels,, airports,, police boxes.. tourists info kiosks,, city or village,, district ward offices.