Nope, I do not recall set out sleepers at either of those cities at least from my childhood in the 50's forward. Does not mean that there were not, of course.Did they ever do a set out sleeper for the California Zephyr or the Coast Starlight? I think it would be a great addition in SLC & SAC. In both locations & trains, they arrive late evening/early morning.
OF course the further back you go, the more trains there were. So some other train might have gone through at a more convenient tme thus making redundant the need for set out sleepers on some trains.