I wrote a query on this very topic 5 days earlier, and got good replies - I am tempted to say to the original poster here why didn't he look or do a search !
One thing that would be interesting to hear is how people move hives in these circumstances as they are heavy and pretty unobliging bits of kit!! I see reference to having them on a pallet, but in reality not that many of us are taking bees to farms, etc. nor have a pallet lifter.
I was fortunate as it is really fairly obvious that the colder the day the better. So for me this past Friday was to be 5C max. I had 2 hives to move 20m using a sack barrow - part on a concrete path, part over roughish ground. So to make the rough ground workable I put down on the previous day two long lengths of timber. Friday morning everything looked good, and then I found the unanticipated bonus that I got was that the cold snap brought a good covering of frost over the path I'd laid and sliding the loaded sack barrow over the icey timbers made the task a single person dawdle.