warped brake roters

Let me re-visit some of the remarks about the Rear Drum Brakes. Our first Class C was Ford, but it was Front Disc/Rear Drum. It had been sitting, or at least infrequently used, for years. I did a front disc job with Pads, Calipers and Hoses. Calipers/Pads were so stuck the Pads came out in rust-crusted pieces after beating them apart. Braking much better (at least we had some...) but not Good. Couple years later, tackled the rear with help from an experienced truck mechanic. Well, actually I helped him... What we found was, Yes, stuck adjusters. But more than that. Stuck Wheel Cylinders. And NEW linings. AND Drums with machining marks in the braking surfaces. Somebody did a brake job then parked it long enough that the Cylinders Rusted Stuck and the New Shoes never applied to the Re-Surfaced (or maybe new) Drums.
The Front Disc Brakes WILL stop a Class C. At least with tons of following distance, and we had a few close calls. But that will overheat the Front Brakes, Glaze the Pads, Warp the Rotors, so on and et cetera.
So "are the Rears in Good Order?" is an outstanding question.