Salaam,
It is very tough really, you should be a group of 6 people with 3 cars, your nature should also match with the group, carry enough cash so there will be no excuse to borrow from each other on the way, mobile chargers should be in perfect condition as well . . . . .. drinking water plus glasses etc are very important . . .. .. you prepare well , everything will alright . .. . .. .. my prayers .. . . . . .