Princesses Amalia, Alexia and Ariane will not participate during this event.
Quite understandable IMO. Kingsday with 1000s of over enthousiastic people screaming for photographs, handshakes and expecting you to join & like each and everything in the programme may be a bit much for small children.
Around 10 members of the RF are expected to attend. So I assume it will be the king, queen, and princes Constantijn, Maurits, PC and Floris + spouses. I am not sure about Anita since she seems to still have some problems with walking.
The traditional Queensday concert at Noordeinde palace has been changed. This time the concert will be in Haarlem.
It will probably be the last King's Day in this style. Next year another format wouldn't be too surprising. The security costs have become very high.