Probably OK to bring a sgian dubh so long as its not worn but is within your checked in luggage, Valencian, and I don't think customs should give you a problem. I will need to take my wife for her annual visit to her cousin's grave near Fort William (An Gearasdan) some time during July or August, and as An Gearasdan isn't too far away from Druimnadrochaid I might get a chance to briefly meet some of you.