I know it's technically incorrect, but this way you don't need to worry about the awkward phrasing in English, while the general meaning is retained.

Something like that. "Подать состав" is a railway term, meaning to move a chain of railcars (aka a train) along. I'm not sure if it has a specific sense, like maybe moving a train up to the platform?

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Note added at 3 hrs (2011-03-18 02:50:49 GMT)
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From the overall description of the scene, I get the idea that this train didn't exactly breeze into the station.

Сойдет ли это за объяснение, не знаю, но все же - есть схожая фраза в Мультитране: наконец подали обед - dinner came at last. По-моему, просто и доходчиво.

At long last/finally our train arrived.

It depends upon whether they were leaving from a terminus (like most of the children evacuated in the UK during the war), or from a wayside station. If it was the former, then empty stock would be shunted in from carriage sidings ('shunt in' does have an extra 'railway' sound to it). If it was from a wayside station and the train was arriving from down the line, then many of the phrases given already would be suitable. Of course, even at a wayside station a train could still be shunted in from sidings (sorry, I don't know the US terminology!).

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Note added at 20 hrs (2011-03-18 19:13:40 GMT)
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Also, 'stock' can be used if you want to increase the 'technical' sound of the translation (the stock had been shunted/brought in to the station). It's based partly on many years commuting on British Railways, and partly on crewing locomotives on a preserved railway in Britain.