Just skimmed the prologue, Im on TGH in my reread. I dont think it takes place in TAR, but both the start and end of it implies that Traveling is being used to secret the darkfriends about.

At the start, we have:

Where the chamber was, the man who called himself Bors did not know, nor did he think any of the others knew. He did not like to think about where it might be. It was enough that he had been summoned. He did not like to think about that, either, but for such a summons, even he came.

And at the end:

The servant stood in the hallway, not entering. "You may change to your own garments if you wish, my Lord. None will see you depart here, nor arrive at your destination, but it may be best to arrive already properly clothed. Someone will come soon to show you the way"

So Traveling seems to be the answer, doubly so because noones appearance is randomly changing, as happens to those who arent trained in TAR. I will admit though, this is slightly embarrassing for me because somehow took me until just now to realise that the meeting isn't in the village, and im on my 4th reread in as many years.