The Berlingo etc seem a very popular choice for anyone wanting to cart bikes about.
As a Berlingo owner I find the fastest/easiest way to cart bikes around is with a tow bar mounted bike rack.
I've never understood why anyone would want to move bikes any other way.
It takes under 30 seconds to get out the rack of the boot, mount on the tow bar and then, 30 seconds per bike to fix to the rack.
As the bikes are only a foot off the ground it means no mucking around getting them to roof height (where the bikes are then exposed to to the elements).
It also means that the rack can be easily removed and stored in the shed or boot when not in use.
Also it means no messing around with removal of wheels etc to get them into the back, and you still an empty car to then fill with other kit & people.