welcome. some of the best times I have had traveling, I had in Perth!
If you pinch the queen and allow them to requeen, keep an eye on them that she gets home ok. Sometimes they don't make it back from mating flights because they get eaten by birds or something. there's tons of info on here about.
pinching her during a good flow is a good idea. they have plenty of resources to feed a new queen well, and they can store more because they won't be feeding lots of brood for a few weeks. it can be a win-win for you and them. a well mated new queen will easily make up the laying. just make sure she has room and they have not stuffed the hive with honey