That route is described in detail - the Camp Lake from Pole Creek Hike - linked to by the Three Sisters Hike.
The trail/route is not particularly bad, but at places is faint and difficult to find. Kind of an adventure if you're into that.
Going up from Camp Lake, the trail is rather steep and loose. Even Sept 1 there's probably snow.
And then on the other side, there are the two large Chambers Lakes. On the lower one, there's no trail, you just have to walk next to the lake. And as you go below there, there's not really any trail but you can see signs of other people, just go Southeast. Within 1/2 mile you'll see a trail again which goes on to the PCT.
The junction with the PCT is not marked, and any trail is faint. Just follow along South of the creek until you find the trail (if you're going the other direction from the PCT).