I always replace the brakes on both sides of an axle. Whoever just did one side was cutting corners and pinching pennies.
While you're in there, be sure to replace the seals and repack the bearings.
I like your attitude ... as long as you're at it, you might as well do the whole job and do it right. It's a sure-fired way to reduce problems and avoid breakdowns. In the end, it means more time to enjoy your motorhome and less time dealing with hassles and interruptions.
BTW -- I get the impression you're enjoying working on the motorhome as much (or more) than taking it places.
