> Nú skulum vér ganga heim að bænum (why dative? Sorry, I may have

asked this before but can´t remember)

> Now we shall walk back to the farmstead

Dative is regular after the proposition `að', regardless of whether it
expresses movement to somewhere or position at.

> því að mér líst svo ef þeir standa úti fyrir sem vér munum þá aldrei

sótta (soekja, pp) geta."

I suspect that `þá' here is accusative masculine plural "them",
agreeing with `sótta'. Compare this with the neuter singular form of
the past participle used later where there is no explicitly stated
object: `og munu þeir eigi sótt geta'.