I think even if the weather is bad, it's worth DRIVING to any open airfield near your home and spending a bit of money on lunch, etc. Airfields must be really suffering due to the weather, so I think it's worth spending some money in their cafes if they are prepared to be open and pay staff to at least try and have a fly-in on Jan 1st. If enough people turned up and the weather is rubbish, you'd probably have a reasonable time anyway - well better than sitting at home cursing the weather.