Though I am not sure of your meaning when you say "what to run the Upper" I can tell you I am from Durango and I will talk with you about running the upper tomorrow. I have a bunch of cool stories from talking to other folks about running the upper, though most of them are from when the Corsica Overflow was popular. In fact I don't think there has been a successful descent since the early 00's.
I actually would have fired it but I am in Denver posting on the buzz to see if someone will paddle with me. In fact I ran the lower Gnarrows yesterday, solo, no shit. see posts "show me your poudre" and "NOCO weekday paddlers" for quality discussions about paddling.
I've never boated before, but I have posted a lot on Mountain Buzz!