Fred you left out Road Turn branch. Know that cause I have bushwhacked up it a couple of times. No I wouldn't put stream name signs up there are too many of them and most people wouldn't care.
Unrelated to signs but as far as fishing to me it is usually pretty easy to tell which stream I am on if I have a topo map. However, the confusing part is often at a confluence with another stream. Those can be tricky sometimes. I often wonder is this the confluence with stream x or just another one of the countless sluices around a large island by the same stream.