OK, so I've spoken to NovaKool twice on the phone now. The answer I've gotten is that yes, with the door taken off, the total depth is 22".
I will say that the person I talked to did not inspire a ton of confidence in their overall demeanor...
Anyhow, I think between the fridge being theoretically small enough, and the fact that if I end up needing to I think I can take the casing off the door and get to at least 24", I'm gonna go for it and see if I can make this happen. Trailer comes mid-April