I'd pick up a bic lighter onsite, a more conventional fire starter than the sparklite. Gloves or mittens a must, extreme cold weather clothing for long lines also important.

Just based on the weather and also potential threats like riots, a painters/surgical type face mask for snow, cold, debris could be a good idea or at a minimum a balaclava, Buffwear or bandanna.

Everything else mentioned above, great ideas, especially the map.