This is exactly how you do it. I met a guy in Argentina who rode a moped there from Alaska. It can be done. Check these chicks out : http://www.tuktotheroad.co.uk/index.html
If you are not already LIVING at www.horizonsunimited.com
you should be- it makes things much easier. And contact the HU communities wherever you go. I met the coolest people that way.
Keep up the good work man!