When you move, you might want to take pictures of the tank from several angles,to see how the rocks are laid out. When removing the rocks, put them in the large containers that Predator recommended, keeping the rock in order from the way it was taken out of the tank. Label each container, and when adding the rock to it, do each in the same order. For example left to right starting at the front. This way you will know approximately where the rocks came from in the tanks.
When draining the water, just remove it to the same level as the sand or put a small hole in the sand to drain the water slightly below sand level. This way you will not disrupt the DSB to much, and move the tanks with the sand in them.
When adding the water at the new location, place plastic over the top of the sand, and add your water, this will keep the tank from clouding to much, and will keep the DSB intact. When I set up one of my tanks, I used aluminum foil to cover the DSB when adding the water, and I got no sand disturbance.
I hope this helps, and I hope the move is not too far away. If you have any other questions, you can e-mail me at Kelly@Pathway.net