The western side of Iceland, including the capitol, are free of ash. Only the east side is covered, less than half the island. Check the various ash maps showing the path of the ash fall. But I do not know where the Katla volcano is, that is the one that is likely to go next, given past history.
That’s my concern, that and the air travel if that Katla goes off.
I should have gone a couple years ago when I got the passport to do so. It would have been a shoestring budget affair but at least I would have done it. lol