Part of what I do for a living is move tanks. IMHO, the safest, and easiest, way to move a tank is to siphon as much CLEAN aquarium water into containers as possible. Place rocks/coral into containers with the clean aquarium water. Place fish in containers with the same water, but without rocks or coral. Keep fish separate from rock/coral. Trash remaining water and sand from tank. Clean tank. Move tank. Fill tank +/- half way with brand new water. Replace rock/coral keeping coral under water as much as possible. Trash water from coral/rock containers. Replace fish. If you are just way to uncomfortable about a 100% water change, you can top off with water the fish traveled in. I would run the tank BB for at least a few weeks. With the old sand and all the organics associated with it, removed, the load on the system will be reduced. Bacteria will begin to die off. You'll see these dead bacteria as detritus on the bottom glass, which is easy to remove during water changes, further reducing the load on the system. With a little time, the bacteria population will level off with the new, cleaner, environment. The amount of detritus being produced will be reduced. At this point sand can be added. I try to use CaribSea "Special Grade Reef Sand". It's not to small, and it's not to big. Easy to keep clean with a gravel vac.
HTH
Peace
EC