We hit Rivendell last year. If Paul Roos and Peter Jackson (heh!) aren't Gandalf and Aragorn, I don't know who else they could be.
Our defeat of the crows is akin to the Fellowship's first big victory over the wargs in Hollin.
When Roos leaves us, that'll be where Gandalf falls in Moria. Things will get back on track with the announcement of our next coach at Lothlorien. After that it will be smooth paddling until the Falls of Rauros, where (hopefully) things will go a little better for us than in the original story.
We don't want Jack Grimes and Nathan Jones (aka Frodo and Sam) to have to carry the burden the rest of the way on their own.