Regional Pressure Setting (RPS) or Regional QNH - do we need it? Do you use it?

[dont overfil]

Out in the uninhabited areas of Scotland we only have the RPS or 1013.
I'd rather have the safe Orkney RPS over high ground than an optimistic one from an AD over 100 miles away.
The whole idea of the thing is that everyone is flying on the same setting outside controlled airspace in a given setting area.
DO.