Hi Julia, I believe the scent fanning is a kind of self preservation thing the bees do the moment we open a hive. They are letting the other bees in the hive know that they are part of that colony & not a robber bee. That’s the way I understood it when I read it in the “abc to xyz of bee culture”.
You can use the newspaper method, the sooner the better. If you have somewhere about 5 or 6 k’s away you can take the tiny hive with the bees you intend to unite with them, that would save the uniting bees going back to the original hive.
Wax moth are never a problem in the hives. Only if we leave drawn frames or wax sitting around. Having said that, wax moth can be evident in a hive if there is too many frames in a hive for the size of a colony.