Your own driving licence is sufficient for short stays. Without a current licence you will not be able to rent a car. If you plan to cross into the Irish Republic, check that the rental insurance covers you and, if you want to drop the car off in the Republic, find out in advance what the surcharge will be. It is cheaper to do a round trip and drop the car off where you picked it up. Similarly, if you are coming north from the Republic, check the insurance position.
Many hotels can supply adaptors for small electrical appliances such as razors.
Hostellers can leave bags at the central Youth Hostel. It tends to be breezy, with sudden changes from cloud to sunny skies and vice versa. TO WEAR Lightweight woollen and cotton clothes are suitable in summer, with thicker wool sweaters or jacket for spring and autumn days. Pack a raincoat and sweaters, whatever the season, and comfortable shoes for sightseeing. The universal blue P sign shows a carpark or a lay-by.