I will be taking a group of people, friends and family. About 10 of them, no little kids just adults. Would renting a passenger van and driving them around Paris, Versailles, etc. be more efficient to move around the whole group, instead of buying the weekly metro pass for 5 zones since we want to go to Versailles and the other Fountainbleu Chateau. Or should we just stay on the metro for transportation purposes.