My original thought was to just have them separated for this next chapter, with the chapter more like a series of scenes of the different things they have to do while they're apart, and then bring them back together in the next chapter after that, because, seriously, at some point I have to get on with it.
And I've been trying to figure out how the week of celebrations should go, because I still think that's the best way to tackle it, starting with a big ball on her birthday, then the wedding at the end of the week. I'm even thinking it could be a masquerade ball, because first, costumes are always awesome, and second, with masks and costumes, all sorts of subplotty stuff could happen without them knowing who exactly is up to no good. Although it should be totally obvious.
I think I've picked a dress to model her wedding gown on, too, but I may keep looking. Rather than come up with something off the top of my head, I'm planning to rip off some other royal's gown.
I've been helping D study for his history exam all afternoon, so I'm not really in the mood to actually put anything down on paper. Maybe I'll be in a mood tomorrow.