Stayed in Glyncorrwg at the Queens. I'd recommend it anytime, great breakfast, bike storage as secure as it gets & well run. Afan is probably 5 miles drive but Whytes level is within easy riding distance. There's a self catering place in Cymer called Ty Afan that's best avoided if you don't like mildew.
http://www.thequeensguesthouse.co.uk/index.htm