Baron Opal II
Hero
Well, there's direct control and theoretical control.I guess part of the issue is that RHoD assumes it's set in an area not under the control of a larger nation, which isn't really possible in Khorvaire, which is completely carved up by the 5+ nations. There's no real "no man's land" outside of the Mournland.
The Adirondack State Park in New York is vast. You could easily have a thousand people living there without any governmental agency knowing about it. (And there probably are.) It's over 9000 square miles, so find a 100 mi. x 100 mi. part of Khorvaire where there aren't any towns on the map and there you go. That's more than a quarter of Ireland.