Hi Spiralqueen. Although we have done a lot of moving in the last couple of years, I haven't had to move with a two year old and I personally think this is one of the hardest times to move them (sorry!). In fact, I am glad we have nothing planned for the next couple of months as dd2 seems so unsettled after even a few days away - ie even our short trip to Florida seemed to really have thrown her: whereas before she would go to sleep really easily, now it takes forever....
Having said that, the best thing I would say you should do is keep them in their exact routine as much as possible, eg same bedtime routine, same times for things etc. Make sure their bed/cot is up and ready for them at bedtime so they feel more secure about going to bed, but also be prepared to have to spend more time getting them to sleep etc. Also be prepared for a degeneration in their behaviour, more tantrums etc. You might not even associate it with the move, as their behaviour might change gradually (this is what we found with dd1 when we moved to and then back from Pakistan). Of course you might be lucky and find they are fine.
Finally I would talk to them in advance about moving, they do understand a lot at this age, more than we give them credit for, and they might not understand that when you get to your new place they are not just staying a few days and then going back again.
HTH and good luck with it all!