I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Unknown if permission to fly is required, No network in the area, Car Park £2.50, if you leave here & go to Llyn Alwen reservoir I believe that one C/park ticket is useable at both car parks.
Info shop, toilets, bicycle hire, Osprey Nesting here also.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 30/07/2020. It remains the responsibility of any pilot to check for any changes before flying at the same location.