If you go to the DRV website and go to brochures, down under the online form to fill out in order to get a new brochure, there is a link entitled "Brochures Archives." Click on that and there is a brochure there for the 2012 (2013 would have been the same) DRV Suites models and it includes the Full House.
Here is a link to that brochure:
http://www.drvsuites.com/brochures/A...2_Brochure.pdf
Now, I don't know about dimensions, but perhaps the picture with a golf cart on the ramp may give you an idea of the width to allow for two motorcycles.
Obviously, the interior of the garage is wider than the door, so it shouldn't be a problem with loading the bikes separately. Then again, because the rear wall moves forward and back (see pictures), if you want the wall back to give yourself more room in the living area, then you would likely have to leave the bikes parked outside.
Terry