That tracks with what I remember. I studied it as part of my degree work some 40 years ago.
When I was learning about Druidry I focused on the Welsh and west lands. I had already been to Stonehenge (once) and Avebury (three times). I barely touched the Irish matter. Angelsy, as the center for Druid training made it reasonable to focus my studies there. I don’t recall any Druid training centre in Ireland. If there was any I missed, I am sorry.
In short, it’s one day a year when I can be a curmudgeon to cherry people.
Peace and Harmony
Dave the Druid