The hike begins at Crabtree trailhead which is off Crabtree Road just outside of Pinecrest on Rt 108. You will have to get TOPO or some other mapping software to see the TH because it is not on most mapping programs on the web. If you have an REI near you, they carry a Emigrant Wilderness trail guide and an excellent map which clearly shows the loop from Crabtree to Jewel Lake down to Wood Lake then along Pine Valley (not very green these days) to Grouse Lake and finally out by way of a steep climb back up to the trail you take at the beginning.
Here is a link to someone else's trip to Gem Lake which is on the loop I described. and would be a good 1st night campsite if you arrive early to the TH.
http://kevingong.com/Hiking/EmigrantWilderness1.html
A good second night would be Wood Lake and then the hike out if you want to make it a 2 nighter. If you want to make it a 3 nighter, you could stop at grouse Lake which is gradually losing shoreline to water lillies but which has great beach area toward the further end of the lake along the trail itself.
You will need a wilderness pass which you can get on line or at the ranger station at Pinecrest.
There are a lot of other great hikes in the Wilderness which looks like Yosemite without the bears.
PM me and I will send you the wilderness application and other links I have for this hike.