On suggestion is to prepare travels. More or less, this aspect of the campaign hasn't been treated in book 1.
On my side, it was an important moment which allow good moment of roleplay and to ring the characters together.
Regarding the seal itself, I think it would be interesting to adapt visions to each characters. On my side, I plan to have a common vision, plus a specific scene for each of them.
Apart from that, I don't know exactly what you are planning for next steps, but I tried to plan specific event for each characters in next books.