Honestly he wouldn't really be excited unless she suggested murdering everyone on the train - he was a relatively laid back individual in most cases. It took a lot to get him excited. He'd apologize at his lack of enthusiasm if he knew she was considering there.

"I can order the rule book and we can share it, but I imagine everyone will need dice. Or, at least, we should have a few sets of dice that we can share with each other." Everyone should have a notebook from the train, as well as writing utensils. Unless they didn't want to use it for multiple things, of course. "Notebooks too, I guess, if people don't want to use the notebook the train gave them."