It was harder to book the hotel at Turumi Lodge (Osan AB) than Dragon Hill Lodge (Seoul), I think it is because Turumi is more of military facility (So It is used for training, exercise and ect..) So When I called to Turumi to book the hotel on February, I heard the hotel is totally booked for military training purposes. I had no problem of getting a room at Dragon Hill Lodge, and found out the hotel is also used for military and other purposes such as events held by U.S Government.
You can reserve the hotel at,
http://www.dragonhilllodge.com/WP/
Dragon Hill Lodge :
Military from within Korea 738-2222
Commercial from within Korea 02-790-0016
Commercial from CONUS 011-82-2-790-0016
Reservations@DragonHillLodge.com
Since we were taking a train to go to Seoul, I thought I should get off at Yongsan station (train/subway). I recommend you to get off at Seoul station since Yongsan Army base is actually 2 stops away from Seoul station (train/subway). You will have to get off at Samgakji (Line #4) and exit at exit #1. When you walk toward Itaewon (the road is kind of going around to ward right direction) then you will see big statues on the left side and big building on the right side. there will be Korean MP on the street watching for their main gate. Walk takes about 15 minutes to get to the main gate. Dragon Hill Lodge is right inside of the gate #1. (Sign says 'Dragon Hill Lodge')
Resources
http://usmilitary.about.com/od/armybaseprofiles/ss/Casey_4.htm
