Hi M.!!
I have to say that I agree with Elizabeth. If your kids are sleeping well in the current situation, I wouldn't change much either. Everyone sleeping, at the same time,is too much like heaven! :)
We moved to the Cleveland area about 1 year ago from MI. So, it was a big move. It was also #3 move for my 3 year old daughter. What we did was have the kids stay with my in-laws during the "moving" process. I know that it might be hard to have them with some one else depending on your move situation. But it allowed us to be with the movers. It allowed us to first get everything situated in their new rooms as close to possible as they were in their previous rooms. Their furniture, their toys, etc. It wasn't that hard, as I had labeled everything specifically from their rooms, so I would know exactly what boxes I would need.
Their transition seemed to go very well. A lot better than I had expected. I didn't transition either of my daughters out of their crib until they were waking themselves up from getting caught in the crib or trying to climb out. Then, because my girls are on the tall side and will sleep sideways, we bought them big girl beds, literally. They have queen beds - this was to save on sheets actually. In the beginning, I used bed rails, but as the girls got older and able to get in and out of bed (mattress & box on the floor)on their own, the rails went away.
Good luck with your move and your transition.
K.