Seeing this thread, I thought I'd pass along what I observed with a
neighbor van, tho not VW, while surfing last weekend.  The guy had jerry-
rigged one of those insecticide spray cans that pump with air to pressurize
them(which I use as well to rinse off my feet and face as a mini-shower on
a little portable plastic grill I made to keep my feet off the sand/dirt)
with the out going into a copper coil in an enclosure which was heated by a
Coleman gas canister campstove out thru the handle of the spray can which
controls the spray and the off/on.  Then he took is rear doors, which open
from the middle, and hung a drape to give him privacy.  The contraption was
in 1 cement mixer tub with he standing in another to catch the water and
keep his feet off the sand/dirt.  Sez he uses it all the time in Mexico.
The whole deal is contained within the stacked cement tubs. The contraption
looked dangerous yet interesting, but the curtain using the rear door was
interesting.  I had to talk to him as I have been using chilly cold water
thru one of these sprayers for years now, and he was the first I've seen
with the same idea.  Not a full shower, but I can rinse my face and hair
and feebly get the salt off me with only 1 gal of water.  More data to
consider, tho in past threads there have been interesting ideas hanging
curtains in the poptop and good use of those solar showers.

Joe

1990 Westy Syncro Subarized