Hi Brian, and welcome.
I too am a hill loch fisher (for just a few precious weeks each year).
Come midsummer there's nowhere I'd rather be than Assynt, NW Sutherland, wilderness fishing at its finest. Though a 4 hour hike is beyond me these days, there's plenty of more accessible fishing in North Assynt where a maze of rocky hillocks and lochs of all shapes and sizes await. Wherever I wander, I always have the place to myself. My local fishing seems rather tame by comparison and I'm seized by a terrible sadness when it's time to go home.
This place has cast a spell on me.
As for tips, i can offer a few.
On difficult days when the usual cast of 3 wets fails, cut off the flies, tie on a damsel nymph and fish it deep. The lochs are swarming with these little beauties and this ploy will often save the day.
Likewise, a well greased bushy fly, eg deerhair sedge, K Mclaren or a mini-muddler cast into any likely spot and left to drift, will often bring up a fish even though none are rising; the takes can be spectacular !
Here's one I caught in June with this tactic. Note the muddler !
Much has already been written on this forum on the subject. Use the search facility, eg type in Assynt and see what comes up. The epic saga of Scratch's pilgrimage to Suilven and the Fionn loch is a particularly fine and well illustrated read.
You can also search for info on tactics, tackle, flies, etc. Hours of fun on those long winter nights.
Enjoy.
Regards,
Dave.