I read here a lof of ppl 'heard of' ,' in the past years' .. what I can say is that Lorient Festival is one the 5 biggest on here in France (yes I'm french and Britan). My parents live 5km away from Lorient and I NEVER NEVER miss the opportunities to visit them during Lorient Festival. For ppl wanting to go there and camp, I suggest you to go a little around Lorient. There is a lot of camping available around ( by exemple http://www.ploemeur.com/modules/cartographie/hebergement.php?id=3-5-6-11-12) and beside the Festival, there is also a lot of attractions around like Festou-noz or night market or traditional britan stuff. At the Festival, you can get free dance celtic course, there is daily festou-noz, concerts and so on. If you like celtic culture, you MUST do it one time at least