Gwych - well worth a visit! If you've not yet booked Llanarmon DC has two very nice small hotels, The Hand (where the receptionist spoke Cymraeg!) and the West Arms (ond ar werth ar hyn o bryd dwedodd rhywun wrtha i dydd Sadwrn); the Mulberry Inn (formerly Golden Pheasant) in Llwynmawr might be another possibility (oedd rhai cwsmeriad yn siarad Cymraeg yn y bar!).
But back to Llanarmon DC - back in the 1920s Warrington wanted to do the same to Dyffryn Ceiriog as Liverpool notoriously did later to Tryweryn. Yn ffodusiawn DC was saved from that fate - you can see the story here (just about - sorry, facing the sun again!)