With excitement, but also a touch of trepidation, we view the old dusty Toyota Land cruiser that will be our transport for the next three days between San Pedro Atacama in Chile to Uyuni in Bolivia. There are 12 of us and two vehicles meaning seven, plus the driver in each vehicle. I just know with my short legs I will be in the "back back" as our kids used to call the extra two seats in the back of 4WD's. Our fellow travellers are a mixed bunch of independen...