Thanks for the trip report.
I do have one question though... if you had your Garmin on you, why was finding the route down so tough? Why didn't you just follow the GPS track that you made coming up the mountain?
And I know this is a bit of Monday morning QBing, but there are several available GPX files for the MMWT trail (and other Whitney trails, for that matter) that you can download to your GPS the next time you go to make things a little bit easier.
