I showed up at the campsite one morning to find them loading their carts.

Tomorrow, or perhaps the next day, they would pack up their carts and move on, as they had done so many times before.

Later in the evening, the music had taken on a distinctly Caravan flavour and the place was filling up fast.

But my greatest understanding of Brazil came from direct contact with its people through the "caravans of citizenship" that took me across tens of thousands of kilometres.

For the new series, they have romped around South America in 4x4s, crashed a caravan-airship and are hoping to create a smash-hit art exhibition out of cars.