Here's a link to my TR where I covered most of your proposed route save for the bits where you want to tag Mt. Langley and Mt. Hitchcock :
http://www.whitneyzone.com/wz/ubbthreads.php/topics/52320/Whitney_via_the_scenic_route_9The route finding is pretty straight forward. Going from Crabtree Pass to Discovery Pinnacle is slow, regardless of what route you take. They dont call it the dreaded sand hill for nothing. We went around the cirque and up through the cliff bands. It looks a lot worse than it really is from Crabtree Pass.
There are links at the end of my post showing my proposed route vs actual path on caltopo plus all of my pics from the trip.
