Just to say, I live in North Wales and our half-term starts on the 29th October, so you're coming at a good time if your half term is next week ie. It'll be nice and quiet!
I would recommend the Empire hotel in Llandudno, though it's not cheap, it's a really nice hotel, has a swimming pool, lovely meals, parking and has recently been refurbished. I've stayed there with my 8 year old daughter just for the novelty! Failing that, then Llandudno generally as it's so nice there.
If you do go to North Wales then try and visit Bodelwydyan castle, just off the A55 on the way to Llandudno. There's loads for kids to do there, indoors as well as outdoors and you can spend the whole day there. Their website says:
"Bodelwyddan Castle is situated in Denbighshire, North Wales. Set in 260 acres of magnificent parkland, the Castle is now an outstation of the National Portrait Gallery and is open to the public most days throughout the year.As well as being a historic house and museum with a free audio tour available, the Castle also boasts large areas of formal garden and natural woodland. It is an ideal location for a family day out with something for everybody, including an adventure playground, garden maze, Victorian games room, gift shop and tea room.Have fun with the interactive exhibits in our specially created learning environment, where you can have an email photo taken dressed in Victorian costume."
It costs £12 for a family ticket and is a lovely day out, whatever the weather.
Anyway, something to think about!
SK