Heh, I wouldn't expect a heritage line station staffing to be anything like York. On a heritage line, a good place to start is to develop the ability to keep a smile and a friendly manner even after you've got up at silly o'clock in the morning, tidied the station, had six people whinge at you because they think the prices are too expensive, answered the question "where are the toilets?" thirty two times, helped a family with an insane amount of buggies onboard to then be told "oh, no - wait! We wanted to go the other way", been collared by an enthusiast who seems puzzled that you don't know the location of engine number 46498 which visited the line for a couple of days in 1989 and thinks you're as interested in it as he is, and then the second you've closed up the office to take a twenty minute dinner break, had to put up with people banging on the window demanding to be sold a ticket. (Oh, and remember to add "Have a good trip" onto the end of every conversation.)
On a serious note though, provided you put time and effort into voluntary work whether that's at a heritage line or elsewhere, you'll get a lot out of it. I've volunteered in customer facing roles on heritage railways for coming on six years now, and for every shift that's like the above you'll get a good few which go without hassle and you'll quite often find a smile and showing a bit of enthusiasm for the job will see you through and see the customers going away happy.
@Dave1987 - By that logic, I saw a lady drive her car over a metal stump earlier in town, sending her engine oil streaming down Market Street -therefore all women drivers must be careless. Of course that isn't true, likewise whilst some heritage lines have little or no safety culture, many (especially the larger ones) do. I would assume in this case the NYMR adopts suitable safety measures, as would I, and I would think most heritage line staff would too.
Jon