Thanks for the input. I figured that might be the case about the weather. I'll probably get another few free days in July when the weather's better, and maybe tackle a long walk then.

A few more points:
1. I won't be able to drive. I've been in the UK long enough that I can't drive with my US license anymore.
2. Once the Jacobite steam train starts running in a few months, we're going to go visit Fort William for that, so no matter what I'll be sure to get up that way.

So I'm starting to think islands whisky trip this time around. Do you think that'd be doable without a car?