We moved across country with a 6 month old, a 3 yo a, 6 yo, and 12 yo. Talk about nuts. THen we moved back again 2.5 years later.
In fact we have moved 4 times with a 2 or 3 year old, 6 times total Thank you Marine Corps.
Have your family help out. Can Grandma take the toddler for a while? My mom took one 3 year old once and then again took the girls for one move.
Are you doing it yourself? Or hiring a company?
Have everything set in zones. Have all your pictures off the walls and decorative shelves in one spot.
Moving companies do not move paint, liquids of any kind, including soaps, shampoos, etc. They will move dry goods. Put your flour and sugar in gallon ziplocs and seal them in the canister.
Get the boxes and packing paper from UHaul or some other moving company. Do not use newspaper. It leaches onto everything.
HIre a few teens or college kids if possible.
Take mirrors off dressers. Take any legs off piano benches.
YOu can start packing things like linen closets now.
If you have to sell the house you are in, get a storage unit for unneeded items, the bookshelves and books, extra chairs, lamps, take out one piece of furniture in each room to show the house.
PIctures and dishes need to be packed standing up so as not to break. Do not lay them flat.
Start using paper plates about a week before, paper cups too. It just cuts down on the work you have to do.
When you get to the new house unpack your kitchen and your daugher's room first. Get hep from your family and friends.
Actually the first piece of furniture in the new house should be a bassinet if you already have the baby when you move.
Your two year old will bounce back. THe first month or so atfter all this will be pretty traumatic but she will be OK. If she is potty trained expect her to regress for a while. Try to keep her eating and nap routine as normal as possible. If Grandma has her she can keep her away from all the hooyah going on.
Now take a deep breath and try to relax. You will get it unpacked, it just may take a couple years. :o)