I posed this question earlier but on the England forum. I thought I'd re-pose the question here for better insight.
I will be having a one-night stay in Oban on my way to Inverness and will have the following day to do one of the following: I could take a ferry to Mull and tour that island before coming back and taking the 3+hr bus ride to Inverness or I could take a highland tour from Oban of Glencoe and Fort William before taking the bus to Inverness out of Fort William. I am at a loss about how best to spend my time. I love both ideas but want to get a feel for what others recommend. Either experience I'd only have about 6 hours time to do before needing to head out.