Sorry I can't afford it but I can give you some hints from the recent AJ2000. Have a prejam camp for your own contingent troop, for even though there are a thousand scouts in camp your scouts will mainly be involved with their own troop or patrol. Some one in your troop will turn out to be your trader and he/she will trade best with something destinctly Korean, Troop or district badges,troop scarves,are good.Woggles I think are great they can be worn by the reciever long after the Jamboree.
Hints: have all your scouts use the same Distinctive baggage this makes finding your stuff easier. Take a simple cook book some times the supplied incrediants can be challanging. teach them how to wash clothing in a bucket before going.