its not bad with right gear and people who are in the hobby and know what to do. Aaron and i have moved plenty of reef tanks and fresh water tanks for the shop. one thing that i recommend is have plenty of new water ready and always remove the old sand. as soon as you empty the water out the tank, temp swings start and will kill bacteria in sand bed, on short trips you be able to get away with it, also a good bacteria starter is great, like dr tims one and only, ATM has a good one. the hardest part is doing it in a timely manner, i use a mag 24 or 18 to transfer water out into holding containers or to the street to empty tank quickly. just always plan for the worse, get new bulk heads and plumbing.