Base for laying driveway

[hobbis]

I want to lay a new driveway. The materials I want to use are either tumbled blocks or Indian Stone, some people have mixed feelings about driving on indian stone particularly since our would be on a slope, any comments from anyone who has used it or has an opinion. The driveway is quite compact but needs lowering to 2 below the dampproof course. Any recommendations on what we should lay the finished materials on. I have had comments from friends and am now confused. Any comments from 'people in the know' would be helpful.