The rivers of the Cascades flow clear and cold. That clarity means you can see where you're walking . . . that same clarity means algae can grow on the rocks on the river bed. The shallower the water, the slicker those rocks get. When fording, set a foot before you lift the other. Be sure of your footing. Use a trekking pole or staff and plant it on the downstream side in fast flow.
I've met a number of weekend anglers 'pussy-footing' it in the shallow water trying to keep the bottom of their shorts dry. Some give up . . . most get miserably wet. Some follow my route and see the sensibility of at least fording the river nude makes a whole lot of sense. Out here in the wilderness few really care and perhaps some will become converts. Who knows what happens when they head up their direction of the river and I head the other. I know of at least one couple that didn't bother to get re-dressed after fording and parting ways.