I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Balloch Castle is beautiful; you can also access Lomond lake at the park. Be careful about the sky; there will be some small aircraft from time to time.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 13/11/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.