Hugh Allison (scottishtalespinner.com) is a tour guide based in Inverness.  He offers custom tours - from a walking tour of Inverness to a 9 hour car tour of the coast.  He is an historian and grew up in the area.  You pick what you'd like to see and he will come up with an itinerary and other suggestions of things to see in that area.  Extremely interesting and fun to be with. 

You can also take private tours which can be quite inexpensive if there are four or six of you in the party. One operator is InvernessTours.com who list tours to Skye, Loch Ness and Glen Affric, Glen Coe, the far North, the Strathspey Whiskey Trail and many more. They also provide one-way tours from Glasgow or Edinburgh to Inverness which turns travelling into touring. The guides are both local historians and have books published on Scotland's history and Loch Ness. They can be chartered for tours from two hours to several days and also organise a Gourmet Tour of the Highlands.

Cameron Ross, www.happy-tours.biz, is a truly professional tour guide. Not only has he a wealth of knowledge of history of the whole area but but he can describe it in a manner that will have his audience enthralled. Experience has shown that he is also very flexible, adjusting the tour suit requirements. Highly recommended.