Stephen Stewart converted a U1300L Unimog to expedition camper.
http://www.xor.org.uk/unimog/mymog.htm
He has traveled to China, Tibet, Mongolia, Siberia with his camper and was fully aware of the pros and cons of the pass thru.
http://www.xor.org.uk/unimog/index.html
Probably 14 years ago I...