There is a good article online on what to do and what not to do that I found when I was looking for information on this about 2 months ago.
I recently moved a 120, complete setup, that I bought used with livestock and all so I will try to give you a few pointers - although mine did not have any corals.
Take a large enough container for your livestock with tankwater and put your fish in it. I had a battery powered air pump running while I drove as well as a regular air pump powered by an AC-Anywhere contraption just to be safe. When you get to your new house, just put the fish container in a safe spot and add a heater/powerhead/pump to keep them alive and well. Depending on how much livestock you have you may need more than one container but I did fine with one.
I bought a lot of Rubbermaid containers from Home Depot of many different sizes. I used three 54 gallon ones to hold about 20-25 gallons of water in each that we transported in a pickup. Even with the lids on you will lose some water so try to have a good deal of pre-mixed salt water at the final destination. Keep it heated and aerated for best results. Oh, once we got to my house we never attempted to move these containers because of how big, bulky and heavy they were. All we did during loading and unloading of the water was move a few 5 gallon buckets in and out.
I used a few 18 gallon Rubbermaid containers for the small amounts of Live Rock that came with the tank and I decided to keep them with water as well because I did not know how long it would take to get them back in the tank after everything was setup. Just try not to fill any container more than 33% for optimal results and for the least amount of water loss, not to mention it is much easier to carry stuff if the weight is spread out.
We left the sand in the tank with about 1 inch of water due to the sandbed being pretty shallow. You may want remove the sand if there is a good amount due to the extra weight but I would recommend keeping it moist with whichever route you take.
We had enough room moving all of this with one pickup and one van btw.
Once we got to the final tank destination and the fish/livestock were situated(out of the way) we put the stand in place and made sure it was level. Next, we started filling the tank back up with the water. I read somewhere that laying some plastic trashbags over the sandbed was a good idea. On top of that, a large & clean metal tray and then on top of that a large bowl. As we filled the tank up we made sure the water would hit the bowl, where it spilled over onto the tray and then finally onto the trashbags. This kept the sand from going crazy. I found that even though we kept all of the water we only managed to fill the tank to about 70%. This is where having some pre-mixed salt water will be good. In my case, I had to let the tank stay at about 70% water level and the fish stayed in their 18g container overnight while I let more saltwater mix till the next day. Once the tank was full I got the filtration system running on the tank. Even with all the steps I took it was still a bit cloudy so I waited another day. Finally I made sure the temperature was the same in the display tank and current fish container and then tried to acclimate the fish to account for any differences in water chemistry after spending 2 days or so without the benefits of good filtration.
It's a bit late so I may have missed a few things but that's the general idea I think. Try to get a few helpers together that you can ask to do things as you need them. I personally wish I would have had more help as it was just my dad and I doing all of it.
:happyfish
