If you want to visit the part of Scotland associated with the Lamonts, then the Cowal Peninsula in southern Argyll is where you need to be. You could stay in Dunoon or Inverary, or in a wooden lodge in the Argyll Forest Park. A hire car is desirable in this area as public transport is very limited. There are great drives through the Arrochar Alps, around many of the lochs and the the Kyles of Bute. There are also may picturesque walks, such as Puck's Glenn, if you have stout footwear. The Campbell's Inverary Castle is well worth a visit.

The Cowall is about two and a half hours drive from Edinburgh (faster if you use the motorway but not so interesting), and about half an hour from Glasgow along the shore of Loch Lomond.

This is an area I know well. PM me if you decide to include it in you trip and I will provide you with further information. Whatever you decide, enjoy the trip.