Combined minibus and boat tickets can be booked from any Trang 'tourist information' shop. 300 Baht will get you a minibus to the nearest jetty and a longtail boat to Farang beach. 250 Baht will get you the 11am minibus to the nearest jetty and aboard the only ferry, departing once a day. The driver of boat and minivan is the same guy. If you take the latter option it's recommended to arrange accommodation and a pick-up from the Ko Mook pier, otherwise you'll have a 3km walk or 50 Baht motorbike taxi ride to get anywhere on arrival.
The return trip is easier and cheaper, with the same ferry departing at 7:40am. With no booking fees or middleman it is possible to get the ferry for 50 Baht and minivan to Trang for 100 Baht. Possible, but not easy. 200 Baht is the more likely combined fare.
Mookies has "tentalows" for 250 Baht and huts for 300 Baht. Hot showers and a bar area available. The huts are dingy, with nothing but draughts, a light, a mattress and a fan. Intermittent electricity.
Had Farang have clean, well maintained bungalows. 400 Baht with shared bathrooms and fan, 500 Baht with private bathrooms and fan. Up to 800 Baht for air-conditioned bungalows.
Resort accommodation is available fronting onto Farang beach.