Just got off that section a week ago - we took 3.5 days in oar rigs to go from Ruby Ranch to Mineral Bottom at around 1600 cfs. Putting in at Ruby shortens the trip by about 15 miles, but your not missing much scenery in that upper section. If you are time limited, I suggest putting in at Ruby, otherwise, add another day on to go from Green River. The evening winds made dinner prep a hassle, but nothing too bad on the water in the afternoons. Expect to drag the rafts in a few spots, but the trade-off is great sand bar camping and no bugs. Enjoy.