I’d say if you can afford it then a combined whisky/wildlife tour is an idea. You often get to island-hop over 3-4 days and visit multiple distilleries, see some incredible wildlife with a guide and a bit more of the area than you would by yourself, chiefly as the local guide knows some excellent spots. We went to Mull with a guide and stayed with him and he took us round to see golden eagles, otters, rare birds etc. It can’t really be emphasised how close to nature you are - We woke up in the morning to get some coffee and saw a 7 foot stag at the kitchen looking in on us…really no more than a metre away separated by an inch of glass! Amazing! I’d definitely recommend going to Lunga and Staffa too. An island of about 4000 puffins who love humans as their predators don’t come and swoop for them when humans are about so they waddle right up to you and stand underneath you. Honestly, it’s like a Disney scene.
We went with this guy for a short 3 day stint and stayed on Oban first then Mull + excursions to the small islands. It’s purely wildlife, no whisky but there are conjoined tours, or those just focussing on Whisky.
He took us a the crack of dawn on Sunday to Iona before the tourist boats arrived. I can’t quite put into words the tranquility and peace you have sitting on a bench with a coffee on the island of a few 100 people, in the grounds of Britain’s first church, hearing some choir singing from within with the sun rising. Bliss.
The absolute highlight was seeing a fully spread Golden Eagle in full aerial combat with 2 massive hooded crows about 50m above us. I’m not especially a wildlife nut, but I think anyone would be blown away seeing the absolute majesty of those iconic animals so close.
Oh, and if you go in any other month outside July/August you will freeze to death.