M.K.
Do you have to move while she is away at Grandma's? I just moved with my 2 1/2 year old a few months ago and one of teh biggest reason's for her smooth transition was the fact that she was mommy's helper all day and was there to help me set up all of her toys/crib and unpacked everything. Get her excited about the move, have her room 100% ready teh first night she sleeps in it, and have something special waiting for her in her new room such as a new decoration(those stiker wall decals are great) or something to make it special.