An option in County Kildare might be De Burgh Manor info@deburghmanor.com
http://www.deburghmanor.com
Local tourist offices in Laois/ Kildare/ Carlow could organise itinerary and activities
Abbeyglen in Clifden.
It is definitely worth ringing and asking about special offers. It is also worth looking at the hotel / last minute sites who may offer a lower rate.
Ditto Gregans Castle Hotel, also not a castle, but with excellent food.Despite the name, Abbeyglen is NOT a castle and would be a disappointment to someone who wanted one.