I'm looking for some info on a scenic walking tour in Scotland, preferably a walking tour that could be done in 5-7 days.
Look at this:
You could do it in stages. It's really tough in places but the scenery is fantastic.
The most obvious is the oldest long distance walk in Scotland: The West Highland Way. It starts in the north of Glasgow City and walks cross country, mostly off road but on good paths, north to Fort William. It is about 96 miles long and can be completed in 4-8 days depending on your level of fitness, determination and of course weather. This route takes you through some of the very best of Scotland's scenery including Loch Lomond, Rannoch Moor, Glen Coe and finishing near Ben Nevis. Accommodation on route can be camping, youth hostels, B&B or a mix of these.
For more info see:
Other long distance walks in Scotland include The Great Glen Way, Southern Upland Way and Speyside Way. However, I'd only consider them after the West Highland Way.