Im thinking it could/should be done as a more proper RP, so rather than having a character ill be the DM, dungeon master.
I've never done anything like that...but u figure it's just Narrator plus controlling NPCs.
It wouldn't start for awhile as its difficult to.type sizeable posts using a cell phone.
Id make a few introductory posts to post rules and poster CSs and then to briefly introduce the world and kickstart the events.
At the beginning it would be geared toward finding the prisoners, but as the story progresses, and as I read about Van Buren, perhaps we could venture further into what would have been.
PS
Van Buren was the codename for the Fallout 3 that was cancelled. New Vegas used parts of it.