Longside has been mentioned a couple of times and is worth a visit. The coastline between Fraserburgh and Banff is particularly scenic, with unusual geological features. Also the forest of Lenabo, 3 NM southwest of Longside airfield, still has visible from the air foundations of three large airship hangars dating back to WW1, from where sorties were launched against German submarines. Did you know that the Germans had many submarines sinking shipping in the North Sea over 100 years ago?
At £5 a landing and friendly tea and biscuits, what's not to like? They even have a private cash-only supply of Avgas by prior arrangement. Mogas might also be possible. It's an interesting destination or detour.