So I have ended up with a small (5lb) CO2 canister.  It seems it would be
pretty easy to install in the van.  A 20L keg is pretty compact and would
fit nicely at the back of the 'wardrobe'.

This seems like a practical way to carry an adequate supply of beer.
 However, how would I chill it?  Has anyone looked at ice bucket immersion
chillers, series of peltier coolers ($3 a pop on ebay), or any other things
that might make sense for a tight space.  Perhaps a copper line wrapped
around the fridge cooling elements?  Doubtful I think.  I had previously
dreamed about using heat from the engine coolant to drive the westy fridge,
but that started to get way too far out.

Or just stuff it and enjoy it english style (aka warm).

Just dreaming of other work to do on the van while I slowly reassemble the
engine.

Tom

ps, if you recall the off-with-her-heads thread, I out-with-her-engine, and
then off-with-her-pistons, and now I am making good progress putting it
back together.  doing it with the engine the van was hell, glad to be on
the 'other side' of vw owners now.