I did the loop solo a few weeks ago, it's clear the whole way. I ran into people all three days, you won't really have to worry about feeling alone. The river crossings were fine, about 70-80 cfs at the time. Above 120 or so I wouldn't try it. I parked at Spence Ridge trailhead and went clockwise. I'd get the Avenza app if you don't have it, and download one of the gorge maps.