Great update! When we went on the tour I had my camera with me (I figured they would not search my bag and if they did I would just have to hand it in or so...) and then it turned out as you said that it was no problem at all, we were just told not to use cameras in the backstage areas.
I loved KTTK, but I think we never heard about the reason why countries are on name tags (the only reason I could think of would be language). So I am looking forward to your next update.
It's great that Katie and Caitlin are still friends, wasn't there something about Caitlin having moved away? If she was at the birthday dinner it seems like they managed to keep their friendship going despite the distance.