I was intrigued with the idea. But ultimately I see it as beneficial only if you have large cargo to carry. Which is the basic premise of a toy hauler
Otherwise I prefer the traditional set up.
Having fixed beds,closets and furniture has it benefits. The open space is nice for hauling a toy or Kayak etc. But if your not hauling anything the open space just becomes another area to set up.
While my bunkhouse days are coming to an end. I do like the new mid ship bunkhouse floor plans that allow for a rear lounger area and a dedicated bunkhouse room for the kids.
I do think a toy hauler vs. a bunkhouse is a viable idea with lots of versatility.However in the end a traditional bunk house fits are needs/style better.