When we last visited Mull 2 years ago, Calgary Bay looked like the sort of place to avoid. The beach itself is fine but the wild camping site was overcrowded and dirty looking.
Fidden farm was not what I had imagined. It was a much bigger site than I thought it would be (like a CL) and quite expensive.
It's a nice area round Iona but again very busy in summer with lots of coaches coming and going.