I moved my cats three times in a year, three different states. The first move, I got a sedative, which just made one of them vomit a lot. After that, I just put them in their carriers and made them deal with it. It actually went fine once they got over their initial freak out. Start keeping the carrier out where it's visible and accessible now. Make her eat her meals out of it so that it's not a stressful thing anymore. Then when moving day comes just put her in and go. The longest move I did with my two wound up being about an 18 hour drive and it was fine.