I think it was just being in the character's mindsets. Especially after a hellacious storm as Random described, and being soaked and cold, one would understandably WANT rest, whether they get it or not.
I know for a mechanics view, we don't necessarily feel fatigue yet, but it is just a quirk of roleplaying I guess.
Rane will certainly press on with the group, though she may complain from time to time. Wet leather armor will that to ya.