I have moved my 55g tank that was a year old with a 4 inch deep SB. I only drained out all the water I could, but I left the SB in the 55g tank undisturbed. The empty tank with sand was vary heavy but I was strong and my friend too, so we could muscle the tank carefully onto a collapsible table for support and carried the table with the tank on it strapped to the table. We got it to the truck folded the legs to the table up and place it in the truck. I drove slow not to disturb the sand as much as possible, it wasnt vary far of a move either. well got it to the new home carefully unloading it and placing it on the stand, the sand did shift a bit and had the smell of swamp gas. So me already tight on money from all my moving expenses couldn't afford new sand, so I did what came to my mind. I laid a plastic trash bag over the top of the sand and placed rocks on all 4 corners of the tank on top of the trash bag, then I filled in 10 gallons of SW then removing the plastic trash bag and added a pump to stir it all up. Then I drained all of the water I could, I placed the trash bag back in and poured in another 10 gallons of SW and mixed it up again with a pump and emptied it all out. I placed the trash bag back in on top of the sand and filled the tank half way and removed the bag from the bottom added the pump back in and it didn't have the swamp gas smell anymore but it looked cloudy. I placed my rocks and livestock into the tank and filled it to the top. Over night the cloudiness went away and no bad smell and nothing died and the tank didnt leak.
I have one more move to do, from san diego ca to portland or, about 1075 miles and in going to start with new sand.