You could just move them slowly, but this will only work if the ground between the two sites is reasonably flat and doesn't have any, for example, walls in the way.
The traditional idea is to move them 3 feet at a time, but I wouldn't do this every day, as they have good memories. If the hive is moving backwards, i.e. the entrance is facing backwards you can get away with about 5 feet at a time. If you are moving them forwards then no more than 3 feet.
A complication is you are moving two hives which I suspect are currently close together. This being the case it may help to move them a bit apart as they start their slow march and then bring them together nearer the end.
A move say every 3 days, carried out either early morning or as it gets dark, should see them in their new site in about 6 to 8 weeks.
But as already suggested, the simplest would be to take them somewhere else for about a week and then bring them to the new site. If your association has a branch apiary they might be happy to give them a temporary home, especially at this time of the year.
If you want to try a riskier approach, check the weather forecast and if you see a prolonged cold spell coming, say one of 3 days minimum, then move them in one go on the evening before the cold weather starts. After moving them, put something over the entrance, such as a leaning board or the branch of something like a Christmas tree. This will help the bees realise something has changed when they first venture out after the move.
When they do start flying check the old site and if a large number of bees are hanging around then the hives will have to moved quickly back. By large I mean a few hundred. The odd dozen or so could be ignored.