> I saw lots of Vanagons on my trip, but the only friendly people that
> waved were near Corvallis, OR. Still, it was a fun trip.

There is no tradition of waving to other Vanagon drivers here in S.Calif.
About all I've ever noticed is a knowing glance.  It's not being
(intentionally) unfriendly.  As Vanagons become less common, perhaps that
will change.  About the only wave you'll see now is ... uh ... nevermind.
//Jack