Yoseman, that area is some really good backcountry. I've not come across anyone who has hiked over the pass a mile west of Glenn Pass. But it certainly looks like it wouldn't be too difficult for an off-trail route. Most people just want to hike the trail and be done with it.
Ten years ago, I hiked down the Charlotte Creek drainage, and it was one crazy bushwhack farther down the canyon. But you wouldn't encounter that section.
Salty Dog on this forum is interested in some JMT-alternate routes, and maybe he has researched more of the Sixty Lakes section. I hope he can add some help here.
