Just used the caravan for the last time until March/April. What do I need to do to prepare for the winter? I've got moisture crystals and I'll stand the cushions on end. But what else. Don't really want to take the battery out if I can help it as it's too heavy for me to carry. Is it essential? The water tank is empty but I've read about draining the pipes - How? I've also read about taking the taps off. The caravan will be in outside storage in the south where it doesn't usually get too cold and it will be booked in for a service in January. Can anyone advise me please.