Something like Smokeless Joe's setup (photo below using previous generation Sprinter - now for sale BTW), but with a current generation M/B Sprinter 3500 Chassis Cab, MINI JCW and A/S 25FB.
The current generation of Sprinter with more powerful engine could probably handle a MINI or some other lightweight car under 3,000# along with ~7,000# trailer, car bed/ramp modifications and gear. The Sprinter after-market Curt hitch can handle 10,000# with 1,000# tongue using weight distribution. GCWR (Gross Combined Weight Rating) of the Sprinter is 15,250# and max payload is 6,226#. The latest Sprinter will soon have 4x4 available, but NOT on the Chassis Cab versions. Angling the car bed higher near the car could reduce the length of ramps needed for loading... and not having a generator behind the cab like Smokeless Jow would allow slightly longer cars to fit and still allow room for a tire rack above/behind the headache bar.
Alternatively a Ford Super Duty F-350 Chassis Cab, for example, has a similar bed length with the Regular Cab (Super and Crew Cabs would probably be too long - reducing rear bed length) as the Sprinter... but a much higher capacities of GCWR 30,000#, Payload 7,872#, 16,000# towing... and of course very high torque diesel engine AND available 4x4. However, the F-350 appears to be almost 4' longer than the Sprinter - pretty significant (The Fords seem to have very long engine bays vs. Sprinter).
With respect to the overall length of the TV and maneuverability around smaller sites, I suppose a work-around for this issue could be to purchase a 12V
trailer dolly to handle the baking-up of the trailer into a site.