Five day trip to the Highlands last August, at the very start of that long hot bit of summer. It was wonderful.
Airfields: Oban - Tiree - Barra - Inverness. High points...landing on Barra, flying down the Great Glen, hanging out in Oban which is the friendliest airfield in the world.
Tiree is..OK, flat, quiet...dunno, only spent half an hour there. Barra is open strange hours, dependent on tides, needs PPR so phone well in advance, not that difficult to land on (said my co-pilot, who did the landing), but looks scary and very wet from the air. Lovely place; wish we'd spent longer there. As many here will tell you, definitely go to Oban...you will, if only to get fuel.
There's loads more, but I'll leave others to add it.