These will challenge you more than any dumbbell row. You'll be essentially rowing your bodyweight with one arm.
Don't let your shoulder shrug up, keep your core braced, and pull with control. You'll feel your core work double-time to stabilize the offset load. Your pulling muscles will also contract deeply. To make it easier, simply go flat footed or adjust your angle.
A beastly set of traps is a sign of a serious lifter, but too much shrugging can cause postural problems down the line. Is there a perfect trap exercise that builds a serious yoke, without the drawbacks? Check this out.