This is wild, rugged country. That route over Deadwood Peak, down into the Mokelumne Canyon, and then up Jackson Canyon is a sufferfest even today---and we've been working on some of those trails for a while now. Amazing adventure. Walker did it with horses!
https://www.altaonline.com/dispatches/a40982966/expedition-retrace-crossing-sierra-nevada-nonnative-people-robert-roper/
Check our our website: http://www.backpackthesierra.com/
Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963