Thanks! That helps a lot to know someone has really done it and it works. I had read a lot on TSA's website, but I was concerned with keeping it cold on the flight. I didn't relaize they would let you just use a ziploc bag full of ice. That would be perfect, since every hotel has ice.
What about pumping enroute? Did you ever have to do that? I am just remembering airport bathrooms and going yuck! I don't kknow the exact times yet, but I know I will have 2 fairly short flights with a layover, and I think at least not pumping during the layover would really be pushing it. I would definitely be hurting. And if I do pump during the layover, how do I keep that milk cold. Would they give me a hassle about bringing ice when I don't have any milk yet? or maybe get some ice enroute from one of the fast food places in the airport (I know when I was pregnant and craving ice water, I did get them to just give me a giant glass of ice that I could keep pouring my water into ... so I guess that could work).
Sorry for all the questions, but this is really the only thing that concerns me about the trip ... well that and leaving them with DH for 4 days and hoping he doesn't pull out what little hair he has

I mean, he has them all day anyway, so that is not new, but he is used to my help in the evenings/weekends.