Still in the deep freeze...de-winterizing on the road?

Ideally I would flush, sanitize and blow the lines before I left. If weather did not permit that I would take a couple of jugs of water for the road and spend a night at a full hook up site south of the freeze line and de-winterize there. Sanitizing does not take an exorbitant amount of water and I see no reason not to do it at a full hook up park.