That's a great idea. We can put up a back room post beforehand asking people if they want in on it. And then maybe put up a short fic style bit about the ride, and allow people to tag in with almost being run over by a minivan. Sort of the way the Black Sunday plot was run for the Harry Potter thing.

In specific bits, one or another of the people could get out of the minivan to find a corner store for cigarettes, a bathroom, fast food service, whatever, and THAT way there could be interactions with loads of people if we wanted.