If I'm not mistaken, HomeGrown was the only tour company that offered a two hour tour which was ideal for my needs. I pre-booked through Viator, but you can also meet them at the ferry stop. I chose the tour that includes Gayhead Lighthouse, but also gives you the opportunity to see other parts of the island. Dee Dee was fabulous... driving a big old van along winding, narrow roads (in a rainstorm!) while still managing to share all kinds of great information about island history, geography, real estate, notable residents, etc. This was a bargain for $35. I highly recommend HomeGrown Tours!