Yes , sounds daft but I would definitely drain it down . We've just had our first snow of May and there's more forecast . The very year I can't just piss off to Spain we have the longest winter I can remember . It's been shite for 8 months . I was nin Spain for the fist two though . Have a lovely weekend .Flurry of Hailstone half an hour ago. Looks to be quite heavy overnight Monday. I’ll have to drain the van down just in case.