Just outside Ballymena, near the village of Broughshane, Slemish has a free car park with a small information centre & toilets (which are temporarily closed due to covid). There are great views from the top even without a drone. It is a very exposed mountain and can often be too wet or windy to fly, which is when your backup (phone?) camera comes in handy.
Land owner permission requirements unknown.
View and discuss this location in more detail on Grey Arrows.
Co-ordinates: 54.88313, -6.104284 • what3words: ///fiery.goodbye.foremost