They drive the van, wait for you at difficult crossroad and can be reached at any time on their cell phones if you need them.
Every night they will plan with you the next day itinerary, discuss the points of interest and the possible hardship.
They transfer your luggage, buy a pic-nic when needed, pick you up when you are tired.
They will care for your wellbeing and help make of the tour one of the best vacations you ever had