It’s not hypothetical, it has to be legal. And it needs to be a fixed-wing aircraft, with an enclosed cargo area.
Thank you for the suggestions, everyone. The C-23 and Casa 212 look like they would fit the bill physically, but they both require a crew of 2 or more.
I think this is the answer. The Pilatus I linked too earlier can definitely carry motorcycles. Not ideal, but it works.
I’ve searched the FAA Registry and found the Type Certificate Data Sheets for the SD3, C212, and DHC4. Unfortunately, you are correct in saying that they are all certified dual pilot. The Shorts Skyvan (pdf), however, is not. Check the fourth page for required crew. It is perhaps not the most beautiful aircraft to ever grace the skies, but it seems like it may be able to get the job done.
If you are planning on arriving in style, maybe the PC-12 and bikes would be better than this thing…
Ok, somebody has to ask it- what is this for?
the Shorts Skyvan does have a rear cago door, and can transport vehicles:
http://www.summitair.net/fleet/shorts.html
http://www.summitair.net/fleet/shorts.html#loadconfig
I think this is the answer. Anyone have a current trade-a-plane? I found some for sale online but no prices.
Brian