Re: Best time for holiday?-Piece of string content.
Over the long term March is probably the most promising month, best chance of decent cover and good conditions, while less likely to be blasted off the mountain. However there's no period that's an absolute cert! Just to illustrate that point not a single lift turned for snowsports in the whole of March 2012 at any of the 5 areas...
If you were booking time off now with a view to increasing hill time in the winter season, I'd probably take a bit of a scatter gun approach to be honest and take several days or couple of days here and there over a longer period. Depends how much travelling would be involved for you in doing that, but then you'd have less chance than having a complete blowout of your booked holiday time than if you booked one long stint.
On the other hand just watch the webcams and look out for those nasty 24 hour winter viruses!