If you are doing a day trip into Kaesong (Gaeseong) then bring your mp3 player (the bus ride is a bit boring on the SK side) and whatever because there are plenty of secure lockers in the South Korean immigration facility. Do remember to go back to the lockers when you get back to the south!
Also there is a money exchange facility in the SK immigration building - which was open before we arrived.
Opposite the secure lockers (upstairs) there was a gift shop which had lots of drinks, snacks and a few bread items. Really appreciated for a 6am start!
