Okay, we are going to keep her cool (I'm always freezing on airplanes so that should be easy), and try a half-dose of Dramamine. And, the idea of the pocket bib is great! We have a couple of those so I'll stick them in our carryon. The last time she was carsick, I was trying to get her to throw up into a plastic bag, but given the recline on her carseat and the fact that she's never puked into a plastic bag before, I was just left with a puke covered kid holding a puke covered plastic bag. Yuck!!!!!
Thanks again for the advice!