I'm getting in way late on this discussion, sorry.
The Phoebe Snow, in its original form, was conceived, designed, and built to be a daylight train, meaning that there were no sleepers built for this train. The schedule between Hoboken and Buffalo was never meant to accommodate a sleeper.
Also, since this train was aimed at the business traveler, and not the leisure traveler (the same has always been true of airlines, the business traveler is where the money is), there were no baggage cars built for it, either. One can only guess the idea was that the traveler the DL&W was targeting did not carry a lot of luggage, maybe an over-nighter they could toss in the overhead rack and that would be it. That, of course, was the purest of theories with this train.
As with most good intentions, the reality, from what I understand, quickly became a different story. For one thing, the railroad realized they were losing head-end business by not assigning any to the PS. Since no head-end cars of any type were built for this streamliner, whatever they had on the roster, including boxcars, ended up being spliced into east and westbound trains. Aesthetics apparently were circling the drain early with the Phoebe Snow.
Considering that DL&W was such a small, yet wonderful, railroad, it's remarkable that so much of the Phoebe Snow still exists.
I take it you guys are aware of this organization http://eldcps.org/
They're doing some wonderful things.
On a related note, whatever became of the former Phoebe Show E8s that pulled Conrail's inspection train for years?