S.K.
Shelley,
You can expect changes in sleep pattern and regression in certain behaviors. It will pass. The best thing you can do is to maintain routine, normalcy and rules. Don't let everything slide under the excuse of the move; it will just freak her out even more. Discipline the same as you always would.
I have moved twice with toddlers and each handles it a little different. My 2 year old son had a hard time understanding that his toys were coming to the new house even though he watched the packing process, saw the empty house, and we told him a hundred times that his toys were going to the new house. Even after we unpacked he believed some of his stuff was left behind. My son is bright, there are just some things too hard for a 2 year old to understand, so be ready for that kind of thing.
Piece of advice: Unpack daughter's bed first. That way, even if you don't get much unpacked the first day, when it's time to go to bed she will have her bed, sheets, pillow, blanket, etc. Have her keep her favorite whatever with her instead of packing it. Try to keep the same bedtime routine, timeframe and rules.
Good luck,
S.