Hi there, I,m new to the forum but will do an intro later. Saw your enquiry and as I've fished most of the lochs in that area thought I'd pass on what I learned. Loch nan Eun, long walk in, quite steep prior to the loch itself. Worth the walk though. Used to camp overnight to make the walk worthwhile. Despite its high altitude there is a good head of trout 1/2 to 3/4 trout. Kate McLaren, Mallard and Green, Mallard and Claret. Very occasional larger fish. Permit from Invercauld Estate Office in Braemar. Lochnagar is a very acid loch with resulting very small trout. Loch Vrotachan holds the largest trout of the lochs in the region with several 2 lb fish taken every year. Invercauld Estate for permit or Ballater Angling club who manage the loch and have a very nice fishing hut there. Loch Beannie is another Invercauld Estate water worth a cast. Loch Callater is a very good water for pike on the fly but no trout to speak of. Hope this helps.