This is primarily a farming community; there's not going to be anyone else wandering around in the dark unless it's a burglar. There's a fair amount of starlight through wispy clouds, and many of the buildings have the dim glow of lanterns visible through the slats of shutters, so Myrtha finds that she can navigate just well enough to not feel that she needs to light a torch or lantern. Unseen, the Realstream River flows quickly enough under the bridge that Myrtha can hear the rapid flow around the bridge pilings. She continues north through a dark grove of trees that come close to the road on either side, and then the thicket opens up on the right to reveal another Inn, smaller and more worn than the Golden Grain Inn. In the dark, it's impossible for Myrtha to make out the details on the sign. Past this second Inn is a 3-way intersection; Myrtha takes the right turn to head toward the lake or reservoir formed by damming up the river. A farmhouse recently painted with a pale paint shows up very clearly in the dark on her left, followed by the dark silhouette of a barn. A fenced pen near the road probably contains some animal stock, but she can't see what. As she continues, the starlight glimmers on the water of the lake, half seen between the trees that line the road here. Myrtha is having a very pleasant stroll. From the edge of the water, she has an unobstructed view of the southern and eastern shores. The low hill bearing the temple above the village to the east is dark, but she can see little pinpricks of light in various residences across the water. She figures it will take a good fifteen minutes further to get to where she remembers seeing the second bridge when they arrived.
At this point, each PC needs to roll a CON save, DC13, against poison (so Aanbo has ADV).