Delighted to help.

7th, 8th, 9th and 10th July 2011 and Ortigueira is the biggest festival in Western Europe (as far as I know). Three stages, Oysterband, Shooglenifty, Anxo Lorenzo and Cristian Pato are the big attractions for me.
The local tourist board and government subsidise it - so there are no charges! Details are on the website - there are some contradictions on the dates on the English bit ( e.g some pages have not had 2010 altered).

http://www.festivaldeortigueira.com/index.php?lg=ing

Can you log in and contact me? Otherwise I am dave at deyre dot plus dot com. I can probably help with Shetland too!