Ooh!
Taking the scenic coastal rout, good choice.
Oregon has got some beautiful viewpoints, the coastline through that area is amazing, even from the road. The redwood forest is also pretty cool, we did the classic tourist thing and drove through a carved out tree, it was actually kinda neat.
You're in for a wonderful trip and I can't wait to see what you show us! Pack extra camera batteries! And memory, and...awww jeeze, jealous.

Fun fact: when standing on the edge of the Grand Canyon it still doesn't look real. That's how astounding it is in person.

Cheers,
Speck.