looking at the pictures I thought that you had rear disc brake pics and earlier drum brakes mixed in the article. Now I realize that there is a set of drum shoes inside there for parking brake. Wow, :banghead:Do these shoes wear out very often? Should I plan on replacing with my rear pads/rotors?

They will wear out. When you do the rear brakes you can pull the rotor and have a look at them. I just replaced mine but had a leaky seal and the one side was trash. IIRC they dont have alot of pad on them when new.

You might replace them once in every 10-20 years. I keep mine setup to the truck won't roll with the parking brake set. So as for driving around with the parking brake set never happens with me. So my parking brake shoe life is really good.