Well, tickets could be sold at the check in desk, or with cash from a conductor the way Amtrak does it. If someone misses the train ohwell. Same with the layover on the Notch or what have you. I've written to Conway Scenic, we'll see if I get a response.
I think it could be a plus going the otherway. Picking people up in North Conway(where a lot of hotels are) and dropping them off at Attitash for the rides. They do have a RDC car, why not use it for something like this. Try it, doesn't get the ridership it can be dropped. People want to cars off the roads the Conway Scenic is a great asset which untapped potential.
Regards,
Gary