To answer my own question, my wife and I just finished a tandem sea kayak trip, paddling from Potash ramp to Spanish Bottom (53 miles)in roughly 10 hours over 2 days. The return trip took 3 days over about 20 hours. Flow was 3000 - 3300 cfs and sandbars required some routefinding. Had to drag up Indian Creek riffle but paddled everything else.