Just wandering if there are any of you out there who practice this, or know a lot about it? I have been reading all I can on it but it still remains a little cloudy on a lot of issues of doctrine.
It is what Christianity was when spread to the celtic lands of Europe... The Roman Catholics send missionaries and stuff and many celts readilly accepted the new faith (this was about the 4th or 5th century). However, without connections to the Roman Catholics pope and stuff, they sort of became protestantism before the protestent reformation. They held on to many of their celtic holidays, but used those days to pray to God, instead of trees, haha.
I guess you've read Timothy Joyce's Celtic Christianity: A vision of Hope. Some say it's all a myth, because the Celts are too diverse to have a common, distinctive spirituality. For that view, you might check out W. Davies, The myth of the Celtic Church.
Celts were diverse and the gods they worshipped were diverse, mostly but not always divided by geography. They ranged from Rhiannon to Epona to Camulos, and many, many other lesser known gods and goddesses. Many will never be known because of the genocidal campaigns of the Romans pre-300 AD. I don't think Celtic Christianity is a myth, I've seen many iconic references to the Celtic Trinity in Ireland, Scotland and here in the US. Transitioning from the old religion to Christianity was allowed to stray for a time by Rome so that people would come to Christ willingly. Just as the Christian calendar of high holidays was restructured by Constantine and the Council of Nicea to make the transition easier. Also, many Celtic communities 1700 years ago were very isolated and without guidance so things often stepped off what would be called "The Path".
The original Celtic Christians weren't Catholic neither was Patrick. Even after their conversion to Christianity the Pope refered to them as "unchurched people". Matter of fact the Celts sent the first Catholic monks packing. There is evidence that the Celts may have kept the Sabbath by worshipping on Saturday as commanded in Exodus 20: 8-11.