If you have five months, I would season a sponge filter in your display tank and start netting your fish a day or two before the big move. As long as they're small enough, you can keep them in a cooler filled with tank water and filtered by your sponge filter for several days. While the sponge fiter is probably unnecessary, you have some semi-long-term storage in case everything goes wrong (like a dropped tank).
If I was the one moving, I'd drain all but an inch or two in the tank and move it. If fish are going to be in the last inch or two of water, make sure to pull out any hardscape items a week or two before the move in order to suck up any anerobic stuff that could be established under rocks, etc. It will also make the load lighter. While in transit, make sure the tank is on a flat surface. The last thing you want is a 4' pane of glass to torque on the way to the new home. Once it's time to go, the tank would be the last item to leave the old house and the first item to be set up in the new house. Once you're there, put 20 gallons or so in the tank and check for leaks. As an extra level of precaution, I'd add 15 or 20 gallons at a time until it's full. After that, you should be set to go.