Go raibh maith agat a Mhaidhc as do chomaoin. Ba lá crua ea. Sheoladh (sent?) mé ag mo sheomra agus d'ith mé mo dhinnéar an déanach!
And yes the Rockaway Immersion days are great! I went to one and had a great time also. I'm pretty sure that they're run by the Irish American Association of Northwest New Jersey,
http://www.iaanj.com. And you're right about the New Jersey clan - it's in large part due to the superb teachers like Rath and other teachers from Daltaí that make it a great area for learning Irish.
I think you're off to a good start with your list of organizations, and would just like to suggest that you include (easier written than done) other groups like Club Chonradh et al. The more we network for and with each other the better off we'll all be in terms of supporting the Irish language.