I did that route NOBO in 2021. The section between Reds and Iva Belle is often traveled and well maintained.? The section between Iva Belle and the intersection with the JMT near Tully Hole is much less traveled and maintained, but not in any problematic way. More like all the other non-JMT trails in the Sierra.? There is at least one significant water crossing but I don't think you'll have issues with it in early September.
Ive Belle is amazing, I wish I could have spent a whole weekend there.? Great place for a wilderness zero day.
