I'm a little Truckee obsessed at the moment and if you are as well check this video out. If you need someone to show how the, where and when, then Matt "Gilligan" Koles is the guy. If you want to go it alone, then look for land marks, There are a few.
I did stop at the fly shop in Hershdale when traveling through recently and I was told the river from Tahoe City to the Town of Truckee was low and the larger fish were congregating in the deeper pools and within the cut banks. The river changes as you move below the Boca outlet to the state line as the flows were heavier due to Boca being 90 percent full. It sounded like the conditions were favorable but who really knows unless you try. Be sure the check the river's regulations as I was told the river was being patrolled.