I'm in the same boat as you,
@KinkyOne, having not walked the VDLP but I when I looked up the average temps in February I saw average min temp in Madrid was 3 degrees celsius. My rationale was that if it was that cold down by Madrid, that from there north it was not inconceivable that it could by freezing with icy conditions. If I'm correct the VDLP comes up through Astorga which also means a trip over O'Cebreiro in mid- to late-March which also is well inside the freezing and snowy part of the year. It is entirely likely you and Falcon are right but I've never been a minimalist and err on the side of caution when I'm out trekking alone.