Highland farm Grímsstaðir lies 28km south of Dettifoss near the junction with the Ring Road. An old farmhouse contains sleeping bag accommodation (per person 6000kr), and the farmer's own house offers three double rooms with made-up beds. There's camping in the fields by a brook.
It's been reported that much of this farm sold to British billionaire Jim Ratcliffe in 2016. As of the time of research, it still functions as a guesthouse.