Wales has some excellent Bluegrass festivals. I've just got back from a superb weekend playing for an Appalachian dance team at the Coastline Bluegrass Event held just outside Conwy on beautifully manicured farmland up a hill with superb views of the Castle and the bay, and a mountainous horizon.
The North Wales Bluegrass Festival is a month later, in a park just outside the Conwy city wall, with a star lineup from America, Europe and the UK, and many fine picking sessions on the campsite.
Ray