I've moved several times since we had the fish - all several hours drive further south since the last time!
We have a special plastic billy can thingie (not so special - you get them from almost any camping store) that holds several gallons of water from the tank, plus the fish. I move them into that as last thing before we move, keeping the heater with thermostat and air pump in there with them until we actually leave.
The filter media goes in a sealed plastic tupperware box, with some tank water and the plants.
The tank then gets drained and fully emptied of substrate, which I usually tie up in several large industrial strength bin liners!
Once I get to the other end, the first thing I do is get the air and thermometer back in with the fish, set up the tank and move them back.
It's a pain in the backside I must admit though, especially trying to get the fish back in the tank!