I am going to stick my neck out here:
I think the Cali is far easier to drive than many People carriers or large estate cars. The high seating position means the front corners are visible, the big mirrors cover you usefully for reversing.
The CAMC motorhome course is designed for great whites, big lumbering things where often the cab is narrower than the rest of the vehicle, and quite restricted vision for reversing with an abnormal (for a car) length.
The Cali takes a little bit of getting used to, but only a little bit. Go on to an industrial estate on a Sunday afternoon and have a good practice. It's a little wider, but not much and a little longer, but not much, than average but the seating position, short rear overhang and a "wheel in each corner" feel makes it a doddle to drive most times. The mirrors are the cats whiskers for narrow spaces, if you don't nudge them then you are not going to nudge anything else.