Here's a review of the Dulcimer Festival, which was held in & around Bushmills in 2005, including a couple of photographs.
Here's a quote from someone who attended one of the concerts:
“We have been to a lot of folk music evenings in various places over the years, but the evening in Portrush where we met you has to rate the best of the lot. The sheer joy, enthusiasm and professionalism of all the musicians involved was tremendous, but we especially enjoyed your music - you combined together really well and were obviously thoroughly enjoying the whole experience yourselves.”