What would be the point of transporting the 'junk' for other countries to see and presumably wonder what the helicopter looked like before the 'crash' when complete renderings and drawings were already available online before the OBL raid?
Would the idea be that the Americans saw pictures online of the stealth helicopter they didn't actually have, then made a rear end section to look exactly like the published articles. Then on the day of the raid they transported the fake rear end to the raid site and left it there.