Hi CMACH,
I'll make the assumtion that you already have a permit for the main trail? If so, you'll need a different one to do the MR. It's possible to pick up a walk-in one however..
I'm just a little behind you....I still have to do the MT but I'm already itching to try the MR.
-PR
Not exactly true as of this year. Now a Whitney zone permit is a whitney zone permit - you can hike whichever route you choose. Unless you are doing an overnight - then you need to be specific about your hiking plans.