When the water flows that fast, you have be 3 times as tall as rogue bull elephant and 3 times as heavy to safely wade and fish the lower Sac.. Even floating it is a losing prop..
My son went up last year with his one man Steelheader dual tube floater. He was down stream to the carryout point in less than 3 hours, normal flows would have taken 6 to 8 hours. He caught one fish, and he is better than most guides. He went three weeks later with a guide in a drift boat, and they made the trip in 2.5 hours. He caught the only fish of the day, a little 16 to 18 incher.