Smith is tuff to fly fish.
There are a couple of spots below the forks, and a few off of the north bank road, but most bankies fish above the forks(where the south enters the main).
Use Google Earth. Spots to gear fish are not that hard to find, spots to fly fish...ummm, different story. The river tends to be deeper narrower and faster when compared to others. People do fly fish and catch fish tho.
Also your timing is a bit late for the Smith. Might want to think about rivers farther south as they tend to have later runs. Altho, I think the south fork fishes later than the main - access is a little tuffer, and the neighborhood can get a little itchy.
Report to follow?
JGB