I just returned from Korea for 7 days trip yesterday. I just brought my 4.5 yrs old kid and left my 11 mth in HK. I still maintained the milk pumping for twice per day during these few days. I brought all the ice milk to HK after that. For weather, it\'s 23\'c in daytime and 13 in nighttime. All the big malls with nursing room and playgroup in the cloth floor for kids. You r not suggested to carry the baby for the trip as the mtr station is stroller unfriendly in Seoul. U hv to pay extra for taxi.