I'm surprised at the number of pictures we've seen so far. IMO, the British Royal Family is never very good at realizing what good PR it would be to release pictures. So in that sense, it's wonderful that we are getting car arrival shots. If past history has proven anything, there will be a group family shot released and that will be it for official photos.
To answer a few questions that have been posted:
1. Victoria arrived in a separate car from her parents (The King was seated next to Queen Silvia, but was cropped out in some pics...who wants to see him I guess?)
2. Mette-Marit had to withdraw her acceptance to the event due to doctor's orders. She suffered a concussion several weeks ago while on a visit to Russia and according to the Norweigan court, she is still suffering from side effects, so she was not able to attend. Haakon was scheduled to attend along, but I don't know if that's still the case.
Also, William must be on duty with his training otherwise he would not miss such an event. Hopefully we will continue to see some more arrival shots. Boy, I would love to be a fly on the wall at the palace during cocktail hour!