I've done Sand Island to Mexican Hat at 7000 cfs. Fast, fast, fast. No rowing required, though eddying out for campsites was kinda tough. 8 Foot was an easy wave train.
Just did the Mexican Hat to Clay Hills section at 2000 dropping to 1500. Government's rocks were pretty well covered, and the line was obvious, center-right. At that level, the sandbars downstream from Grand Gulch were covered enough to fool us more than once. Lots of heave-ho to get the overloaded rafts floating again. I assume the last day is easier at higher levels 'cause the sandbars would be covered, and at a lower levels 'cause you could see them more clearly.
You can never step into the same river; for new waters are always flowing on to you. - Heraclitus of Ephesus