We took a two berth two years ago. Diesel engine, stick shift! We had a great time. Rented from a company in Glasgow near the airport but don't have a record now. We stayed in campsites but I understand you can just pull up on the side of the road if you are prepared to 'go it alone'. We had two weeks all over the Highlands. Would do it again in a heart beat. We estimated the costs were about the same as staying in budget hotels and a rental car, probably less for meals. We felt we had more freedom, especially being able to prepare some meals (usually breakfast and lunch) in the van.

Brian