Here, check this out as a way to enjoy your drive later on this summer when
it gets really hot.

http://www.coolshirt.net/racing-club-system24.html

  I used one of these with good results in my Black very stripped-out
racecar.  One August day, at Thunderhill Raceway near Redding, California we
were 'red-flagged' (stopped, immediatly whereever you are on the track)
while some emergency vehicles responded to a crash.  The outside temps were
a record setting 123f in Redding...inside my black P-car, encased in my
fireproof driving suit and my helmet with the sun beating down and a couple
of 4" diameter exhaust pipes running beneath my carbon fiber racing seat..I
survived in comfort, but only because I had my Cool Shirt on, full blast!

  Now in a Vanagon, on a nice warm outing, you could also use the cooler for
some kinda beverage storage, right between the front seats...With some
creative engineering, I bet you could adapt the system to use as a shower,
too..

 Happy friday don hanson