As of about a week ago, that was still the process. Maybe it's been changed and calls are no longer made.
That's not surprising and is very common. It's considered a special event and the vast majority of Epcot CMs are not in the loop when it comes to special events. Having said that, the location is posted on
MDE and guests should make a point of knowing where to go before the party. If it does get moved, there is signage at the outdoor location informing and directing guests to Norway.
Again, not surprising. Because the event is not put on by the Norway attraction, most Norway CMs aren't aware of the details regarding the party. You can blame that on Norway's management, they should have a program in place informing CMs.