Drain the tank, put the fish into as large a container as you can easily transport and fill it with tank water. Chuck the rest away. Move tank, fill with dechlorinated tapwater, get to temp, acclimatise fish by adding new-temp tank water a little at a time to the container they're in, and then put them in the tank once it's in position.
That's if your tank will be moved in relative quick time (i.e. a couple of hours or so). If you have a very long move, you'd be much better rehoming the fish to a friend's tank for the duration of the move, then putting them back in once your tank is set back up again.