I've never had to move a tank but if I did this is what I would do: Get a styrofoam ice chest and siphon some tank water directly into it. This is what I would put the fish in. Then get a regular old bucket and siphon wome tank water into it and put as much of decorations in it as possible. You could also put filter media in it. That will preserve the good bacteria. Then siphon out the rest of water except for just enough to keep the gravel covered. Again, to preserve good bacteria. When I get to where I'm going, set it back up with preserved water (just in case there is a ph difference with new water you'll be adding) and then finish filling it up with new dechorinated water.