Way back

[Donald Trump]

A close friend you have known for a long time, a homey from back in the day

[Jessica]

The rear facing seat in the very back (third row) of a 1960s era Station Wagon. It folded down into the floor for a smooth cargo area or folded up as a smaller bench seat, often the youngest kids were seated there. Very dangerous location if there was a collision, especially as there were often no seat belts.
Maybe the reason for the title of the movie The Way Way Back is because Duncan couldnt get far enough away from Steve Carell even in the Way Back.