Not that we couldn't do it, but you're basically talking about an Iron Butt Association event. Having done several of these of varying lengths (12 hour, 24 hour, 11 day), all they really are is a long distance scavenger hunt.
I think these type events are a LOT of fun. But they require a HUGE investment of time, money and effort to be set up properly. If some in our membership are interested, I would encourage them to participate in one of the IBA events first to see how they do it. Be prepared for a lot of friendly, intense, competition.