Cardiff is the nearest Airport. There's a railway station in Fishguard, with several trains each day. Haverfordwest station has a more regular train service (it's about 40 minutes drive). There's a bus direct to Newport leaves from right outside the station, so you can reach Erw Wen by public transport. However, while public transport is possible (there's a regular bus service, and special holiday shuttles) most people come by car.