The new baggage cars have a pretty efficient layout, but you'd need a full baggage car for the Thanksgiving load on the LSL, period. Also for the mid-june load. Syracuse baggage alone occupies about 1/8 of a baggage car on a peak day. By contrast, on a non-peak day in January, you probably wouldn't even fill a half-bag. I think there's something non-obvious happening. Off-peak-season travellers take substantially less baggage than peak-season travellers. So the baggage load is even more peaky than the passenger load. This raises an interesting commercial possibility: "checked baggage for the holidays". That didn't make sense with dedicated baggage employees (who would be doing nothing most of the year), but with trainside baggage handing done by conductors, it actually might make sense. During the peaks, with the carry-on space crammed full, add a baggage car and offer what airlines used to call "checked carry-ons" or "gate-checked" bags.