One of which is a Need To Know. If they don't know what the heroine is packing for her journey, she's not going to be able to pull it from the pack. Especially because it's magic.
One of which is something I've hinted at and which I finally concluded has to go in now: why and how she came to be declared her father's heir. and why there was doubt about it in the first place. (It revolves about her father being tricked into marrying her mother, and repudiating her when he learned the truth.) The heroine knows it, there is no big reveal that's convenient in the future, and just teasing the readers with it is foolish when it's not going to be a big reveal.
The problem is, these are both things the heroine has known since she first remembers things. Always interesting, trying to slither such information into a tight POV.