I would highly recommend Rathgillen Farm. Only an hour from Dublin but out in the beautiful Irish countryside.
Peter as a host is very welcoming and happy to sit and have a chat about what there is to do and see.
We were having a birthday celebration and meet up with family and this proved to be the perfect base , and easily big enough to accomodate 6 adults and one child with plenty of room to spare.
It was lambing season which proved very popular with my children. Ask Peter about visiting the Hill fort, which is only a short walk up the hill the views are tremendous.
As well as all the other attractions locally don't forget to take the short walk into Nobber for a drink at the the friendly Keogans.