Put your fish in a large cooler box to keep them worm first of all, put your filter and heater in the cooler box until you are ready to leave this will give you time to get the tank ready for transit.
Its very importent to completly empty the tank, gravel, water the lot. Put the gravel in a plastic bag if you can to keep it moist. Be carefull when moving the tank that you dont stress the tank at its seals.
When you get to your new place put the filter and heater back into the cooler box this will again give you time to set up the tank. At this point dont worry about decorating the tank just get the water right. If at all possible try and keep water from the tank before the move. Fill the tank with water and condition it and get it up to temperature. Every 15 minutes swap a litre of water from the tank with water from the cooler box eventually the water in the box will be the same as the water in the tank, this will reduce stress on the fish. Add your fish one by one. Good luck.