Travelled w EF 28-135IS. Good all-round package. But sold mine. Next trip prob GR1V; if i bring dSLR, it will be 16-35, 50/1.4, 75-300. 75-300 has added advantage of not being white. All will fit into one small sling camera bag w extra batt n CF card. XDrive pack seperately, prob leave in hotel.
If i intend to do serious shooting (as well as tour), it will be 16-35, 24-70 and 70-200/2.8, together w tripod. The 3 lenses + 10D still fit into one small sling bag, tho the tripod doesn't. The 3 hoods will stay at home though.