Hi Christine.
From when we lived in Marsden parking is pretty easy.(14 years since we left) There are loads of side streets and generally everyone meets at the station and walks alongside the cannal to tunnel end. I always seem to remember it was late January though, but age, time and distance get the better of me.It was always a great night.
http://www.kirklees.gov.uk/events/eventdetails.asp?evID=6179
Have a great time. We had thick snow one year, made it even more spectacular.
Love n peace.
Eric