Are you rafting or kayaking? Working hard or floating?
I'd expect at least a 2 to 3 day trip minimum but you'll probably be looking at long days on the river.
The Dotsero gage includes the Eagle at Gypsum. Subtract that from Dotsero and you'll get a reasonable idea of the Upper C above Dotsero.
Once you figure out the flow above Dotsero, take the flow from Colo at Kremmling and you'll have an idea of the flow between along the Upper C.
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse