They have probably swarmed already if there are sealed queen cells, but on the assumption they haven't and you still can't find the queen, it is better to try to reduce the swarming instinct. The principle is that you need to separate flying bees, queen and brood and that if you do this , this slows them down.
If you can't find the queen I think it is still better to try to separate the flying bees from the brood, as that will cool their heels.
So...on the original site leave 1 or 2 open queen cells and a frame of stores. Fill up the rest of the box with drawn comb. Put some feed on this box if the weather forecast is bad and there is nothing in the supers.
In the other box on the new site a metre or so away, reduce the queen cells in that box to one open cell only. The queen is probably in this box, but you aren't sure.
The flying bees will go back to the original site.
After 3 days go look in the boxes and you will know where the queen is because the eggs are there. You should destroy the queen cell in this queenright box if the bees have not done so already. You should get rid of any extra queen cells they have made in either box.
I was given good advice when I was a beginner beekeepr about finding queens, but the most useful was, 'You have to believe you can find her, otherwise you never will!'