I think someone made the point earlier that Max would not have known about the rendezvous point and I agree, he came out of conciseness as the final orders where being gone over by the group.
How did he get to the rendezvous point? How can you all forget his (Max) quirky smile as the gyro captain turns up at the tanker crash site?

The gyro captain would have been at the briefing, known the orders and the rendezvous /meeting place.
It is he, (Gyro Captain) who is driving the bus as it pans to the Feral kid as the last words are spoken as the convey makes it way north!
The gyrocopter was broken and all three, max, Ferral kid and gyro made it to the rendezvous in the motor Pagagello was killed in. Max is seen standing next to it right at the end and in the opening hazy shots as the now old Ferral kids speaks.
Simples!
