Somewhere Ham had a thread. He does the back in move only sits on a padded lazy susan type thing that's on top of the seat, then he just swivels around on that.

I've developed a technique of smoothing my pleats and sort of falling into the seat (sedan). After I'm in place I lift my tail end of the seat and sweep the pleats into place.

With a 16 ounce wool kilt its a matter of comfort only. Can drive six hours and the pleats will not crease even if they're folded under there.