In reply to Lankyman:
Lovely island. It would be a bit small to base a weeks walking on, but a great place to immerse yourself in. The bird reserve on Oronsay is great in Spring. Some nice camping spots. Some lovely beaches. You could go for ferries that allow you to spend half a week there. But if you decided to go there just to take it all in and just 'be' there, a lovely place. Good central place to view other islands. Treat yourself to a meal on the ferry. Otters, corncrake amongst things to look out for.