Yes! That is a tedious section of the JMT (the only tedious section, really) and the Duck Pass route is a great work-around.
Once in the town of Mammoth Lakes, you take one of the shuttles to Lake Mary. Take the Duck Pass Trail over Duck Pass, past Duck Lake. Not far below the Duck Lake outlet, rejoin the JMT southbound.
It's not a difficult pass; and you cut maybe 2 miles off (compared to the official JMT route). Lots of lakes, lots of places to camp.