bring 70-200F2.8 IS USM II, 16-35, 50F1.2, 85F1.2 Battery grip, 580Ex2 Flash, extra memory card, batteries, tripod, cleaning kit. a big carrier bag to put all these inside, not to mention u going to korea, put on more clothing if the weather is cold .. so come back on think, this photography trip or a holiday? you want to spend all your time shooting and carrying such heavy stuff?? or just something light?