Some people who run ass-thumping stuff like the Lochsa at high water use oar rights. It gives you one point of certainty in an otherwise fluid situation.
I used rights my first two seasons rowing, tried the other way, and sold 'em. I don't like the oar being fully engaged the instant I dip it into the water (which in a smaller boat can spin you sideways) and have been in fixes (near-pin/wrap) where rotating my upstream oar saved the day.
Rowing rivers with lots of flatwater (e.g.
the Grand Canyon, with upstream winds) you quickly learn how to rotate through each stroke so your oars are square in the current at the middle of each stroke and feathered in the wind. The rotation also seems easier on the wrists and shoulders.
Try both ways. No pressure to decide.