There will be a lot of force going through the bottom joint - the central chassis member will act like a long lever, and as you go over speed bumps and pot holes there will be a lot of strain going through it. Driving it to the launch site will probably put the equivalent load/unload cycles as flying it for 100 hours - pot holes are very harsh compared to grass. It will also stick out a very long way, and the mental stress of trying to get round corners and past cyclists will make driving it a not too relaxing experience!
When you pull out of junctions I doubt other drivers will have the mental capacity to realise how long it is and will probably ding it.
Maybe have a quick release for the central chassis member like chrsfrwll suggests.
Failing that how about rolling it onto a 5x4 car trailer bed?