The 15 footer you could move slowly to their new location, say a foot at a time.
With the other 2, you could try moving then and then placing some brush over the front of the entrances for a couple of days. This will cause some confusion on the bees part as they leave and they will reassociate themselves. I think that it is questionable at this distance though, and would recommend moving them the 2 miles, or wait until next winter.