The same info you mention above is on Facebook, but no more than that. Both Aran Trad Fest and the Aran Islands Hotel have individual pages, but in order to get any further details (if you do) you have to send a Friend request, which I don't want to. It really does look like the hotel has a major hand in this event and would surely be able to give you more info (even the largest of the islands isn't that big). I think your best bet is to get in touch and ask them direct. The following in on the hotel's Facebook page and also (as I'm sure you probably know) their website. Let us know if you find out more - good luck.

http://www.aranislandshotel.com
Email: info@aranislandshotel.com
Phone: +353-99-61104
Fax: +353-99-61225

Kilronan
Inis Mór
Aran Islands
Ireland