I don't instruct, but I have been known to fly out of Caernarfon more than once! Not done so recently, cos the folks there seem to have gone all unfriendly. Pity, cos it's a lovely spot.
I have a little home up in the mountains of the Tre'r Ceiri, where they burn English homes unless you buy a round in the local pub once in a while.
Iechyd da!
Keef