Good to see Scotland's highlands being discovered by Porsche owners. Provided you avoid the tourist months (and the midges) of June, July, and August, the empty, flowing, roads are a joy to drive in any Porsche. The scenery's not bad either.
Jeff correctly mentioned wild deer, the mangled carcasses of which are an increasingly sad sight on many highland, and lowland roads. Deer are an absolute menace for all drivers and motorcyclists on the roads. In recent years the deer population in Scotland has soared as wildlife conservation and traditional hunting habits have changed.
Deer are the most unpredictable of creatures. They have one default reaction which is to sprint at high speed into the path of any vehicle which comes their way. Roadside fences and stone walls are no obstacle for deer who vault them with ease. I've had many near misses with deer suddenly leaping onto the road in front of me. If you are unfortunate enough to hit one, they can do serious damage to your car. Not all deer are like Bambi, fully grown adult deer can weigh several hundred kilos. Many of the roadkill deer on intercity routes have been hit by HGV's. In those instances, the deer, of whatever size, definitely come off second best when hit by a 40 tonne truck. The opposite is the case with Porsche sports cars. Take care.
Brian