Looking for advise on material for driveway base. Will be clearing 1-2 feet of top soil where 200 feet of driveway will be going. This will take me down to rock base. Is it better to build the base of the driveway (up to 2 feet thick) with 3-6 inch rock or 0-6" rock? Both will be covered with 0-3/4 inch gravel for final grade. Want to eventually pave driveway and would like to construct driveway to minimize risk of driveway developing ruts and frost heaves. Any suggestions appreciated.