I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
From Capel Curig, drive past the Plas y Brenin mountain school, & there is limited parking on the left. If that's full then there is further parking down the road by the lake,
Don't go too far however, otherwise you will encroach on NT land & a bearded man in sandals will leap out from behind a bush & wave his walking stick at you!
I've never seen fast movers in this particular valley, however it does get used by military rotary wing stuff, so keep your ears open.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 02/10/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.