Winters in my part of Canada are r-e-a-l winters (down to -40 C at times) so
if anyone knows about 'winterizing' vehicles it would be us. My winterizing
consists of simply running the faucet dry, draining the water supply tank,
leaving the cap off for a morning (to ensure every drop drains out), and
wrapping my lips around the faucet spout  and sucking out the remaining
water from the supply lines. Although I stored the pump indoors as a
precaution for the first couple of winters, I don't do that anymore.

Roy O.
'87 Westfalia
(till death us do part)