A quick look at the map shows probably Wrexham is the nearest decent size town.
Or the North Wales coast (Rhyl, Colwyn Bay or even Llandudno). All 3 are seaside towns.
There is a decent road along the north coast so you could easily get to any of those 3 towns.
Rhyl is a sort of mini Blackpool (but years since I have been there)
Llandudno is nice, with plenty to do. Lovely wide prom, a pier, the Great Orme (huge hill with a cable car to the top).
http://www.llandudno.com/