
Clive and Anne are not what you'd call 'ordinary motorhomers'. Their idea of fun is a 9 month trek from the UK to China and back. They travel in the company of other like-minded adventurers and the story of their journeys can be found here. Pay particular attention to the chapter 2002-10-20 titled 'More Photographs (October 2002)' and have a look at the 'China 2002' route map. Quite amazing.
Ewan McGregor and Charlie Boorman have done a couple of TV series chronicling their motorcycle journeys and they had a ton of help - back-up trucks and 4drives plus a London based control center to hustle on their behalf via satellite phones. In comparison, Clive and Anne, and their fellow adventurers, followed some of the same terrain but about 6 weeks after Ewan and Charlie. The big difference was that Clive and Anne and Co were, generally, on their own. Ordinary people doing extraordinary things.
Respect.