Food and water would be beneficial. Torches as well, to light the way. [for whatever up-to-date equivalent is lying about.]

I would expect each to bring their own bedding, if they require it, but if it is not much of a burden, perhaps an extra blanket. The heat generators were disabled several months ago, and though I have no evidence to believe it, we may encounter similar changes in temperature during our excursion.

[better to be safe than sorry, basically.]