From personal experience - I guess you will be transiting through either the US or Japan to get to/from Mexico - If so, please get a note from your doctor explaining that you are a breast feeding mother and are travelling without your newborn. As you will frequently encounter TSA staff that don't understand that new parents have to work and travel as well.
As for storage etc. if going on an extended trip, I would just pump and throw occassionally just in order to maintain supply as figuring out ice packs etc. can be difficult. Close to the time returning home, then i would store in the plastic storage pouches and deep freeze in the hotel. Note that you are not allowed to carry ice or dry ice onto the plane so make sure you have the gel cooling pads and a proper insulated bag.
As for storage etc. if going on an extended trip, I would just pump and throw occassionally just in order to maintain supply as figuring out ice packs etc. can be difficult. Close to the time returning home, then i would store in the plastic storage pouches and deep freeze in the hotel. Note that you are not allowed to carry ice or dry ice onto the plane so make sure you have the gel cooling pads and a proper insulated bag.