Cross the England/Scotland border at Berwick on the East Coast and just drive! Avoid the big hotels unless you really need to, and use B&B's, or small Guest Houses to get the real 'flavour' of Scottish Hospitality.
Books with B*B accomodation are readily available, or check online localities.
For food with a difference during your visit include a real Forfar Bridie, a pint of Moulin Ale and an Arbroath Smokie. NOT all at one time though.
Drive for five or six hours in a day and Scotland can be very small, but this route will only scratch the surface of Scotland;
Have day in Edinburgh, where the 'men in skirts' described by a previous poster will only be seen at the Castle, and I'd not suggest to any Black Watch soldier that he was wearing anything other than a kilt!
Eat a real Scottish mince pie in Princess Street Gardens, washed down with a bottle of Irn Bru! Gaviscon sells well in Scotland!
Cross the Forth Bridge and turn off to take the coast road through Fife via Burntisland. The Monument to Alexander the First, King of Scotland is just outside the town on the roadside as you head towards Kinghorn, then on to the Lang Toun of Kirkcaldy, famed for it's linoleum, and the road to Leven, Lower Largo (Robinson Crusoe!) Anstruther and St.Andrews (the Home of Golf), before turning to head inland along the River Tay (passing, but not crossing the road and rail bridges which lead to 'Bonnie Dundee') to take the road via Wormit and Newburgh to Bridge of Earn and Perth then head North up the A9.
Use the link roads from the A9 to drive through Pitlochry (good food and home brewed ales at the Moulin Hotel, turn off midway thro' the town) and the Pass of Kiliecrankie stopping at the Visitor's Centre and taking a short walk into the glen to the Soldier's Leap. Blair Atholl is next then via the A9 through the Drumochter Pass to loop off again into Kingussie and Newtonmore, then passing Ruthven Barracks to Loch Insch and Aviemore. The Ski Road takes you 4 miles to the Mountain Railway to the summit (nearly) of Cairngorm. Loch Morlich is en route, with the wee shop by Glenmore Caravan Park for a cuppa and a slice of strudel! Back to Aviemore and take the road to Grantown on Spey and the Whisky Country.
Head up through Inverness and the far north will astound you, with wild sea views and gorgeous bays to Wick and John o' Groats and Dunnet Head (the most Northerly point of the Country).
West across the top of Britain to Cape Wrath with it's stormy seas, fabulous hills and wonderful light, then South down the West coast keeping to the coast road at all times to Fort William and Ben Nevis, Britain's highest mountain. By the time Glencoe is reached you'll itch to get into the hills but beware! (I'd suggest a walk up the Lost Valley would do fine if you're not an experienced outdoor type). Slake your drooth at the Clachaig Inn on the Glencoe Village road, then drive to Oban and have a dram and admire McCaig's Folly while waiting for the CalMac ferry to take you to Iona for the day.
Sit on the beach by the pier after visiting the Monastery and reflect on where you've been for the last couple of days and then you'll understand why Scotland IS God's Country.