Would love to see (especially pics!) those with combo shower and toilet, with gray and black water tanks. I've been following along with many van builds to get away from a class B, but few are able to make compromises to make this happen.
For those that have, why do you usually put it behind the driver's seat? What does the rest of your van look like (e.g., bed in back, stove top between bed and shower, closet on opposite between bed and sliding door, etc.)?