Whoa. Is this not a place to import something from RST or VI (or, to a much lesser extent, me) regarding The Maroon Van?
The Washtenaw van is the Maroon Van, though it is usually a silverish-blue van these days. I think some of the mystique of the van eroded when Walk-a-thoners found it just o.k. But that was one day.
The offerings are really pretty unusual, from the "basket tacos" of chicharones stretched with corn meal to the hot prune soup/drink, to the picadas.
I still think Marianao/Van is a powerful one-two Chicago street food punch.