Me and my son rode a camel in the Xi'an Wildlife park. It was maybe quite a bumpy ride, but our camel had been thought well to pose for the cameras.
It was more stable than I thought, but I would not like to ride all the way back to Europe though the silk road, not on a camel, nor on horseback-mannerheim style.
There's a lot of camels in Xi'an, thanks to being next to the desert and them tolerating both hot and cold so well. And during the winter - they don't even smell!